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Brookvale(3)MORRIS ASSOCIATES ENGINEERING CONSULTANTS, PLLC f -I 90 Elks Lane, Poughkeepsie, New York 1261 Tel:,(W)454-3411 FW�(W)473-1962 F] 18i Pou 87 Church Street, ghkeepsie, New York 12601 Tel� (W) 471-7900 Fax: (W) 471-7901 WNWOMMENEW0100 " 389 Fairview Avenue, Hudson, New York 12534 Tel: (518)828-2300 = F(518)828-3963 E -Mail: rnorrlscWoCiotes@aol-c0m A - 11 0 - ww Town of Wappinger Planning Board 20 Middlebush Road 90 Wappingers Falls, NY 125 Attn: Mr. Robert Valdati, Chairman Ike: Brookvale Subdivision Draft Environmental impact Statement Town of •• •. MA # 206151 zljj!q Board Mem,7 For your review, enclosed please find five (5) sets of impact Statement for the is •• Subdivision, located off of ]:own of Wappinger, dated November 91 2007, Volumes I and 2. the Draft Environmental Spook Hill Road, in the This submission has been revised as per comments from Paggii, Martin & Del Bene, LLP, dated August 6, 2007, and Frederick P. Clark Associates, lncdated August 3, 2007. Please note the following outstanding items that are currently being addressed by this office'. This office has contacted CAMO Pollution Control, Inc., and: is seeking comme;nts from them regarding the new proposed sewer connect d be I ion to Spook H,ill Road. Once commentsicorrespondence have been receivethey will forwarded to all involved parties. In addition, to completely analyze: the existing Spook Hill trunk line, this office requires further information on the existing flow arriving to this point from up the line. We are in the process of obtaining this information and will submit an analysis at a later date. The New Preservation York State Office of Parks, Recreation and Historic (NYSOPRHP) has been contacted reing the on-site cemetery, as gardwell as structure on an adjacent lot that is approximately 200 years the presence of a spondence have been received! they will be old. Once comments/corre forwarded to all involved parties. E:Wocuments\General\2005\205151NTown\Town - Cvr Ur REVS - 11-20-07.docx If you have any questions please contact this office at (845) 454-3411 extension 57. Very truly yours, MORRIS ASSOCIATES Richard A. Rennia, Jr. P.E. Associate Engineer RJG:mo Enclosures C.C. Peter Galotti, Toll Brothers, Inc. Draft Environmental Impact Statement Brookvale Subdivision Spook Hill Road Town of Wappinger Dutchess County, New York Prepared By: Morris Associates, PLLC 9 Elks Lane Poughkeepsie, New York 12601 Tel: 845454-3411 Prepared For: Toll Brothers, Inc. 60 Merritt Boulevard Fishkill, New York 12524 Tel: 845-897-8900 Dated: June 5, 2007 Revised November 9, 2007 Draft Environmental Impact Statement Brookvale Subdivision Spook Hill Road Town of Wappinger, Dutchess County, NY Prepared for: Toll Brothers, Inc. 60 Merritt Boulevard Fishkill, NY 12524 Contact: Richard Rang, P.E. Phone: (845) 897-8900 Lead Agency: Town of Wappinger Planning Board 20 Middlebush Road Wappingers Falls, NY 12590 Contact: Robert Valdati, Chairman Tel: (845) 297-6257 Date Submitted to Lead Agency (Draft #1): Revised Draft Submitted: Date Accepted as Complete: Public Hearing Date: Comments Due: Prepared By: Morris Associates, PLLC9 Elks Lane Contact: John A. Morabito, AICPO 3411, ext. 50 Broobale Subdivision page ii Drafl Gnvironmentat Impact Stwement Draft Environmental Impact Statement Brookvale Subdivision Spook Hill Road Town of Wappinger, Dutchess County, NY LIST OF INVOLVED AGENCIES AGENCY PERMIT/APPROVAL Town of Wappinger Town Board Wappinger Town Hall 20 Middlebush Road Wappingers Falls, NY 12590 Town of Wappinger Planning Board 20 Middlebush Road Wappingers Falls, NY 12590 Town of Wappinger Highway Supt. 20 Middlebush Road Wappingers Falls, NY 12590 Dutchess County Department of Health 387 Main Street Poughkeepsie, NY 12601 NYSDEC Region 3 Office 21 South Putt Corners Road New Paltz, NY 12561 Town of Wappinger Building Department 20 Middlebush Road Wappinger Falls, NY 12590 Acceptance of Roads and ROW Acceptance of Land Dedications Authorization of Water & Sewer Subdivision Approval Road Acceptance Access Permit for Entrance Road from Spook Hill Road Access Permit for Emerg. Access Road from Fieldstone Blvd Water Distribution System Sewage Collection System Subdivision Approval State Pollution Discharge Elimination System (SPDES) Permit Blasting Permit F:LdocumentslGeneraA2005120515l1FIS4CURRENT DEIS FOR BROOKVALE OCT 20070EIS SOBE BER 2007 Brook vale Subdivision Drafl Environmen(at Impact Statement List of Interested Parties/Agencies Mr. Joseph Ruggiero, Supervisor Wappinger Town Hall 20 Middlebush Road Wappingers Falls, NY 12590 Joseph E. Paggi, Jr., P.E. Town of Wappinger Town Engineer Paggi and Martin, LLP 54-56 Main Street Poughkeepsie, NY 12601 David Stolman, AICD, PP New Hackensack Fire District Town of Wappinger Planning Consultant c/o Wappinger Town Hall Frederick P. Clark Associates, Inc. 20 Middlebush Road 350 Theodore Fremd Avenue Wappingers Falls, NY 12590 Rye, New York 10580 Page iii NYSDEC NYSDEC Division of Regulatory Affairs Central Office, Commissioner of NYSDEC 625 Broadway 615 Broadway Albany, NY 12233 Albany, NY 12233-0001 NYS OPRHP Historic Preservation Field Services Bureau Peebles Island, PO Box 189 Waterford, NY 12188-0189 Army Corps of Engineers New York District, Regulatory Branch - Room 1937 26 Federal Plaza New York, NY 10278-0090 Dutchess County Dept. of Planning & Development 27 High Street Poughkeepsie, NY 12601 Wappingers Central School District Superintendent of Schools 15 Meyers Corners Road Wappingers Falls, NY 12590 E:ldocuments4Genera11200512051511EIS1CURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc $1,001cvale Subdivision Draft Environmental Impact Stadement Page iv CONSULTANTS WHO WORKED ON THIS DEIS Robert Gray, P.E. DEIS preparation, engineering, DEIS review Morris Associates PLLC 9 Elks Lane Poughkeepsie, NY 12601 Richard Rennia, P.E. Morris Associates PLLC 9 Elks Lane Poughkeepsie, NY 12601 Thomas Harvey, Project Engineer Morris Associates PLLC 9 Elks Lane Poughkeepsie, NY 12601 John A. Morabito, AICP Morris Associates PLLC 9 Elks Lane Poughkeepsie, NY 12601 Anthony Brozier, Engineer Morris Associates PLLC 9 Elks Lane Poughkeepsie, NY 12601 Michael Nowicki Ecological Solutions, LLC 1248 Southford Road Southbury, CT 06488 John Collins, Ph.D., P.E. John Collins Engineers, P.C. 11 Bradhurst Avenue Hawthorne, NY 10532 Richard Rang, P.E. Toll Brothers 60 Merritt Boulevard Fishkill, NY 12524 Peter J. Galotti, Sr. Project Mgr. 60 Merritt Boulevard Fishkill, NY 12524 Engineering, plan and DEIS review Engineering, plan preparation and review DEIS preparation and review DEIS preparation and review Wetland delineation, flora and fauna, endangered species assessment Traffic Study Engineering, DEIS review DEIS review E:IdocumentslGeneraA200512059591E1S1CURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impact Statement TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY........................................................................................1 1.1 Description of the Action and Project History ..........................................................1 Surface Water.....................................................................................................51 1.2 Summary of Significant Impacts and Mitigation...... . . .......................................... —.8 1.2.1 Surface Water...................................................................................................8 1.2.2 Wetlands..... ...................................................................... ............................... 9 1.2.3 Traffic ..............................................................................................................10 3.4 1.2.4 Land Use and Community Character..............................................................11 1.2.5 Geology and Soils...........................................................................................12 Geology and Soils..............................................................................................106 1.2.6 Topography and Steep Slopes........................................................................13 3.6 1.2.7 Vegetation and Wildlife....................................................................................14 1.2.8 Utilities and Services.......................................................................................16 Vegetation and Wildlife.......................................................................................119 1.2.9 Community Facilities.......................................................................................18 3.8 1.2.10 Cultural Resources..........................................................................................20 1.2.11 Economic and Fiscal Impacts... ....................................................................... 21 1.2.12 Air Quality and Noise.......................................................................................22 3.10 1.3 List of Involved Agencies......................................................................................23 3.11 1.4 List of Interested Agencies...................................................................................24 1.5 Summary of Project Alternatives....- ................................... ................................. 25 1.5.1 No BuiM...........................................................................................................25 1.5.2 As -of -Right Subdivision...................................................................................25 1.5.3 Average Density Subdivision...........................................................................25 1.5.4 Alternate Means of Access (Ervin & Fieldstone connections) .........................25 2.0 DESCRIPTION OF THE PROPOSED ACTION...................................................27 2.1 Introduction.........................................................................................................27 2.2 Project Description...............................................................................................37 2.3 Construction........................................................................................................43 3.0 IMPACT ANALYSIS.............................................................................................51 3.1 Surface Water.....................................................................................................51 3.2 Wetlands............................................................................................................76 3.3 Traffic................................................................................................................85 3.4 Land Use and Community Character..................................................................102 3.5 Geology and Soils..............................................................................................106 3.6 Topography and Steep Slopes...........................................................................116 3.7 Vegetation and Wildlife.......................................................................................119 3.8 Utilities and Services..........................................................................................127 3.9 Community Facilities...........................................................................................130 3.10 Cultural Resources.............................................................................................136 3.11 Economic and Fiscal Impacts.............................................................................139 3.12 Air Quality and Noise..........................................................................................142 Morris Associates November 9, 2007 E: Idocnmentsl GeneraA200512051511F.ISlCURRENT DEIS FOR BROOKVALE OCT 200N)EIS NOVEMBER 2007 SUBMISSION,doe Brookvale Subdivision Draft F,nrironmentalln+pacl Statement 4.0 ALTERNATIVES................................................................................................1.45 4.1 No Action. .................... ................................................................................... 146 4.2 "As -of -Right' Conventional Subdivision..............................................................147 4.3 Average Density Subdivision..............................................................................148 4.4 Alternate Means of Access (Ervin & Fieldstone Connections) ............................149 5.0 OTHER SEQRA CHAPTERS...........................................I.................................150 5.1 Adverse Impacts That Cannot Be Avoided .........................................................150 5.2 Growth Inducing Aspects....................................................................................151 5.3 Effects on the Use and Conservation of Energy Resources ...............................152 5.4 Irreversible and Irretrievable Commitment of Resources....................................153 Morris Associates November 9, 2007 E: ldocumentslGeneraA2005)20515I TlYCURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSIONdoc Brookville Subdivision Draft Rnvironmental Impact Stalement Page iii LIST OF TABLES Page Table 2.1-1 R-40 Zoning District Area & Bulk Requirements.. .............. _ ............ 35 Table 2.1-2 R-20 Zoning District Area & Bulk Requirements..............................36 Table 2.2-1 Proposed Site Data — Conventional "As -of -Right" Plan_ .................38 Table 2.2-2 Proposed Site Data — Average Density Plan...................................39 Table 3.1-1 Existing Condition Hydrologic Analysis............................................53 Table 3.1-2 Existing Condition Peak Flow Rates.................................................53 Table 3.1-3 Proposed Conditions Hydrologic Analysis ........................................ 57 Table 3.1-4 Proposed Conditions Unmitigated— Peak Flow Rates......................57 Table 3.1-5 Comparison of peak flow rates, Existing and Proposed Conditions - Unmitigated 58 Table 3.1-6 Comparison of peak flow rates, Existing and Proposed Conditions - Mitigated 59 Table 3.1-7 Required Water Quality Volume. ........... ............... .......................... 61 Table 3.1-8 Required Stream Channel Protection ...................... ............ ............. 62 Table 3.1-9 Required Overbank Flood Protection...............................................63 Table 3.1-10 Required -Extreme Flood Protection.................................................64 Table 3.1-11 Stormwater Practices Used...............................................................67 Table 3.1-12 Temporary Erosion Control Measures.............................................71 Table 3.1-13 Vegetative Erosion Control Measures..............................................72 Table 3.1-14 Permanent Erosion Control Measures.............................................72 Table 3.1-15 Bio -technical Erosion Control Measures..........................................73 Table 3.3-1 Trip Generation Rates ....................91 Table 3.3-2 Level of Service Summary Table.....................................................99 Table 3.5-1 On -Site Soil Limitations .....•...••••...•••••• ...............•....109 Table 3.5-2 Soil Types to Be Impacted .....................................112 Table 3.5-3 Anticipated Earthwork Volumes .....................................................112 Table 3.7-1 Cover Types Identified on the Brookvale Property .........................120 Table 3.7-2 Cover Type Impacts Brookvale Property........................................120 Table 3.8-1 Anticipated Solid Waste Production at Full Build -out .....................128 Morris Associates November 9, 2007 E: IdocumentslGenera1120f)5120515IIEISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Fnvironmental Impact Swement Page iv Table 3.9-1 Projected Tax Revenues Generated by the Brookvale Subdivision134 Table 3.11-1 Current Project Site Value.............................................................140 Table 3.11-2 Estimated Total Project Value .......................................................140 Table 3.11-3 2006 Tax Rates For the Town of Wappinger.................................140 Table 3.11-4 Estimated Annual Tax Revenue....................................................141 Table 4.0-1 Alternatives Comparison ............................................................... 145 Morris Associates November 9, 2007 E:IdocumenislGeneral i2005120515I USICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Drai1 Fnvironmental 6noact 8latement Pat,,- v Figure 1.1-1 Figure 1.1-2 Figure 1.1-3 Figure 1.1-4 Figure 1.1-5 Figure 1.1-6 Figure 3.2-1 Figure 3.2-2 Figure 3.3-1 Figure 3.3-2 Figure 3.3-3 Figure 3.3-4 Figure 3.3-5 Figure 3.3-6 Figure 3.3-7 Figure 3.3-8 Figure 3.3-9 Figure 3.3-10 Figure 3.4-1 Figure 3.5-1 Figure 3.6-1 Figure 3.10-1 LIST OF FIGURES Page TaxMap...........................................................................................2 SiteLocation Map..............................................................................3 Regional Location Map..........:...........................................................4 ZoningMap.......................................................................... "As -of -Right" Conventional Subdivision Plan......................................6 Average Density Subdivision Plan.....................................................7 NYSDECWetland Map.................................................................... 78 Town of Wappinger/NWI Wetland Map............................................79 Existing Traffic Conditions Map.......................................................88 2006 Existing Traffic Volumes Weekday Peak AM Hour.................89 2006 Existing Traffic Volumes Weekday Peak PM Hour..................90 2010 No -Build Traffic Volumes Weekday Peak AM Hour ................92 2010 No -Build Traffic Volumes Weekday Peak PM Hour ................93 Arrival/Departure Distribution...........................................................94 Site Generated Traffic Volumes Weekday Peak AM Hour ...............95 Site Generated Traffic Volumes Weekday Peak PM Hour ...............96 2010 Build Traffic Volumes Weekday Peak AM Hour ......................97 2010 Build Traffic Volumes Weekday Peak PM Hour......................98 AerialPhotograph..........................................................................103 SoilMap.........................................................................................108 Slope Analysis Map.......................................................................118 Existing Cemetery Location............................................................138 Morris Associates November 9, 2007 E: ldocumentslGeneral1200512051511EMCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION,doc Brookvale Subdivision Draft Environmental Impact Statement 6.6 APPENDICES Page vi 6.1 Relevant Project Correspondence 6.2 Prior DEIS and FEIS 6.3 Copy of the Positive Declaration 6.4 DEIS Final Scope 6.5 Traffic Impact Study, November 2007 6.6 Area Accident Reports (2001.2005) 6.7 Final Engineer's Report - Water Distribution System and Sanitary Sewer System 6.8 Storm Water Management Plan 6.9 Wetland Report 6.10 Soils Survey Analysis 6.11 Natural Resources Survey 6.12 Engineering Drawings for the Average Density Plan 6,13 Regional Demographic Multipliers — Estimates of the Occupants of New Housing 6.14 Potential Blasting Areas Plan 6.15 Approximate 100 -Year Floodplain Map 6.16 Zoning Compliance Table 6.17 Wappinger Central School District Enrollment Figures (2006-07 School Year) 6.18 Renderings of Potential House Types 6.19 Section 39,7 of NYSDOL Code, `Blasting Operations" 6.20 Limits of Disturbance Morris Associates November 9, 2007 E. ldocumentslGenerall200512051511 EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION. doe Brookvale Subdivision Page I Draft FnvironmentalImpact Statement 1.0 EXECUTIVE SUMMARY 1.1 Description of the Action and Project History The Brookvale Subdivision application is a proposal to subdivide an 89.5 ± acre parcel of vacant land into 54 individual residential lots. The property is located on the east side of Spook Hill Road, approximately % mile south of Meyers Corners Road in the Town of Wappinger, Dutchess County, New York. The tax map number of the parcel is 135689- 6257-01-260870. Although an application was submitted by the applicant for an "As -of -Right" (Conventional) subdivision, the applicant instead wants to develop the parcel as an Average Density subdivision, which allows for the same amount of lots, while minimizing lot size and disturbance of land and preserving more land through conservation easements. The project is expected to take three to five years to complete, making the completion date between 2011 and 2013. In addition to significant frontage on Spook Hill Road (approximately 1625'), the property has road frontage on the existing cul-de-sac at Ervin Drive to the north and at the cul-de-sac on Fieldstone Boulevard to the south. A connection to Fieldstone Boulevard will not be made for the proposed subdivision, but will remain as a potential future emergency access way. Water service and sewer service will be provided by the existing Town of Wappinger systems. The property is in the R-40 zoning district. The "As -of -Right" subdivision plan is in conformance with the R-40 bulk requirements for a conventional plan. The proposed Brookvale Subdivision site previously received amended preliminary subdivision approval on August 16, 1993 for a proposal consisting of 94 lots. An Environmental Impact Statement (EIS) was prepared and a Findings Statement was issued by the Lead Agency (Town of Wappinger Planning Board) prior to that approval (See Appendix 6.2). This Draft Environmental Impact Statement (DEIS) for the Brookvale Subdivision proposal includes, where applicable, portions of the DEIS that are in accordance with the current final scoping document adopted by the Town of Wappinger Planning Board on August 18, 2006. The As -of -Right" Plan serves to determine the base density for the Average Density Plan' The site layout was modified to the preferred Average Density Subdivision Plan. Figure 1.1-5 shows the conventional or "As -of -Right" Pian. Figure 1.1-6 shows the Average Density Plan. Morris Associates November 9, 2007 E: IdocumentslGeneral1200512051510S1CURRENT DEIS FOR BROOKVALE OCT 2007WEIS NOVEMBER 2007 SU8MISSION.doc -a '' � s 5- - Red Hook 1 Kingsto € e, s - r0t0n n M _ ley Hollow R _mss NJ New York 1ty t: REV. No. DESCRIPTION DATE BY ml m MORRIERING S SASSOCIATES, PLkC ULTMM BROOKVALE SUBDIVISION os 9 Elks Lana, 389 Fd view Ave, 33 Poughkeepsie, New Yank 12601 Hudson, New Yak 12534 Phone No. (8451 4513411 Phone No, 15 18) 828-230D Fax No. (845( 473-1962 Pox No, 1518)828-3963 TOWN OF WAPPINGER DUTCNESS COUNTY, NY PE b DATE SCALE ESI6NE�aV: AFB FILE No. REGIONAL LOCATION MAP rurmer, AFB 205151.00 FIGURE 1.1-3 9120106 N.T.S. HeacEDBY: RJG Brookvale Subdivision Drafi Environmental Impact Statement 1.2 Summary of Significant Impacts and Mitigation 1,2.1 Surface Water Potential Impacts The Applicant proposes to develop the site as an Average Density Subdivision, creating 54 single-family homes clustered on lots of 20,000 square feet and larger. Development of the project site will create additional impervious areas, as well as impact the existing drainage patterns on the site, thus altering the current surface water patterns. The introduction of impervious surfaces decreases natural infiltration and allows accumulated pollutants, deposited from the atmosphere, leaked from vehicles, or windblown from adjacent areas, to concentrate. During storm events, these pollutants quickly wash off impervious areas and can be rapidly delivered to downstream waters. Potential pollutants include oil, grease, sediment, and dissolved pollutants. The introduction of impervious areas can increase both the frequency and magnitude of storm flows, and in turn can increase erosion and enlargement of stream channels, leading to degraded habitat. Mitigation Measures Construction will utilize stormwater management practices to treat stormwater quality and quantity. The previously discussed stormwater management practices will capture sediments and pollutants from disturbed areas, including roads and other impervious surfaces, to prevent pollution and sedimentation of water bodies. Mitigation is also provided within the Average Density plan itself, which will create far less impervious surface than all of the previous subdivision alternatives, including the "As -of -Right" subdivision, as well as the original proposed 94 -lot subdivision. The complete Surface Water Impact Analysis can be found in Section 3.1 of this document. Morris Associates November 9, 2007 F Wacumenisl Cenei&200512051510SlCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brook -,,ale Subdivision Drag Environmental Lnpacl ,310temenl 1,2.2 Wetlands Potentiallm acts The Average Density layout has been designed to minimize disturbances to wetland areas and minimize indirect impacts associated with the proposed subdivision. Accordingly, impacts associated with the proposed development of the average density layout will be minimal, of which the entire area is Town of Wappinger Wetland Buffer Areas, which are regulated by the Town of Wappinger. This means that no wetlands will be impacted by this project. Mitigation Measures Through the addition of proposed stormwater management practices, constructed both outside and within the 100 -foot wetland buffers, the potential impacts to the wetlands will be minimized. No wetlands will be disturbed by the proposed construction, and Conservation Easement will protect them. During construction, appropriate soil erosion and sediment control measures will reduce any potential impacts to these regulated resources. See Section 3.2 for the Wetlands Impact Analysis. Morris Associates November 9, 2007 E. IdocumentslGeneral1200512051511EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2()07 SUBMISSIONdoc Brookvale Subdivision Draft LYlviromnentalImpactSlateinent 1.2.3 Traffic Potential Impacts 10 The proposed Brookvale Subdivision will result in contributing additional traffic to the immediate areas of the site, particularly Spook Hill Road and its intersections with Myers Corners Road and Old Hopewell Road. To estimate the potential impacts of the proposed project to local area roadways, a capacity analysis was undertaken at each of the intersections of Spook Hill Road with Myers Corners Road and Old Hopewell Road by John Collins Engineers, P.C. This was done for each of the weekday AM and PM peak hours, utilizing analysis from 2006 conditions as well as 2010 No -Build and 2010 Build Traffic Volumes. Mitigation Measures Based on the results of the capacity analysis, with the implementation of the improvements outlined below, it is the professional opinion of John Collins Engineers, P.C. that the proposed subdivision will not result in a significant negative traffic impact on the surrounding roadways, and the roadway network will accommodate the additional traffic generated at acceptable levels of service. Also note that any traffic impact will be significantly less than that created by the original proposed 94 -lot subdivision. The full result of the capacity analysis is described in Section 3.3, the Traffic Impact Analysis. Morris Associates November 9, 2007 E:WocumentslGenerail20051205151IRIMCURRENT DEIS FOR BROOKVALE OCT 20070EI3 NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 11 Drag Environmental Impact Statement 1.2.4 Land Use and Community Character Potential lm acts The proposed Brookvale subdivision is located in the R-40 Zoning District. The applicant is proposing an Average Density Subdivision, which will allow the applicant to utilize R-20 District lot areas and dimensional requirements as long as the single family homes being constructed comply with the permitted use regulation in the R-40 District. Pursuant to the Town of Wappinger Zoning Law, Toll Brothers, Inc., proposes a 54 -lot single-family residential subdivision with an Average Density Subdivision layout and a density based upon an As -of -Right' conventional subdivision layout in accordance with Section § 240-19 of the Town Code entitled "Modification of lot requirements". For the purposes set forth earlier in this chapter and to promote natural resource preservation and conservation and to minimize the construction and maintenance costs of community facilities and utilities, all directed towards the objective of fostering and obtaining land development of good quality and design at reasonable economic cost, the Planning Board is hereby authorized to review and act upon all subdivisions in accordance with the following provisions. In all cases, the Planning Board shall have the full power of subdivision approval, approval with conditions or denial, as authorized by the Town Law. The proposed subdivision will address market demand for single-family housing in the Town while providing preservation and conservation of natural resources. As such, the proposed subdivision is consistent with the pertinent goals and objectives for residential development and open space preservation set forth in the Town's Zoning Law. Miti ation Measures The proposed Average Density subdivision is consistent with the Town Code of the Town of Wappinger, Section 240-19, "Modification of lot requirements". As such, the proposed project will provide open space protected by Conservation Easement. Furthermore, the Average Density Plan proposes significantly less impervious surface than both the "As -of -Right" subdivision, and the original proposed 94 -lot subdivision. See Section 3.4 for the Land Use and Community Character Impact Analysis. Morris Associales November 9, 2007 E:IdocumenlslGeneraA2005I20.51511FlSICURRENT DEIS FOR BROOKYALE OCT 20071I)E1S NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 12 Drag Environmental CmPaci SlalemertE 1.2.5 Geology and Soils Potential Impacts The construction of the proposed subdivision will disturb 6 soil types. The largest single soil type that will be disturbed is the Bernardston Silt Loam, 8 to 15%v slopes (BeC). The majority of the soil disturbance will be associated with the construction of the residential dwellings and roads. It is anticipated that the majority of rock removal on the site will be achieved through mechanical means (i.e., hydraulic hammers). The proposed project area is not currently used for agricultural production. All of the soils found on the proposed site will be used for the sole purpose of development. Four of the soils, Dutchess-Cardigan Complex (DwB), Bernardston Silt Loam (BeC), Canandaigua (Ca) and Punsit Silt Loam (PzB) will be used in conservation easements on the site. Three of these soils (DwB, Ca and PzB) contain wetlands. The impacts of the proposed subdivision on the site's agricultural soils have been reduced by the Average Density design when compared to other conventional residential alternatives considered. Of the approximately 23.46 acres of agricultural soils (which consist of Bernardston Silt Loam (BeB) and DwB soils) on the site, 3.82 acres will be disturbed. These lands will be converted to residential lots under both the "By - Right" and Average Density layout. The remaining agricultural soils will remain undisturbed. Pro osed Miticlation Measures The greatest mitigation measure to soils and geology is the overall design of the Average Density layout itself, which decreases disturbance to soils and geology due to the construction of a more compact roadway system draining to a series of stormwater control structures, when compared with the conventional or "As -of -Right' plan. When compared with the original proposed 94 -lot subdivision, the proposed Average Density subdivision will disturb significantly less soil. Impacts to soils and geology will be further minimized through erosion control measures. See Section 3.5 for the Geology and Soils Impact Analysis. Morris Associates November 9, 2007 E: ldocumenlslGenera11200512051511EIMCURRENT DIPS FOR BROOKVALE OCT 20071 DEIS NOVEMRER 2007 SUBMISSION.doc Brookvale Subdivi.siol, Page 13 Draft Ersviromnental Impact Stalernenl 1,2.6 Topography and Steep Slopes Existin Conditions Dutchess County is situated in the Hudson River Valley of southeastern New York. The relief is undulating in nature due to ancient folding and faulting of the Earth's crust. The topography has been modified to some extent by glaciations evidenced by the rounded or smooth contour characteristic of the hills and ridges. Pre and post -glacial erosion has caused further modification. The Town of Wappinger stands on the lowland or terrace of the Hudson River, eroded to some extent and marked by rocky or stony knolls and ridges from 25 to 300 feet in elevation. Several smaller valleys, probably pre -glacial, extend in a northeast - southwestern direction, drained by smaller streams and characterized by flat gravelly terraces that lie contiguous to the stream courses (USDA -SCS, 1955). Wappinger Creek drains one such basin in the Hudson River watershed. its drainage area covers some 210 square miles of land, including the project site. The proposed site is nearly level with a low ridge, probably resulting from an ancient thrust fault, rising in a northeast -southwesterly direction through the site. Elevations on the proposed site range from about 235 feet above mean sea level along the stream at the western edge of the site to about 335 feet at .the highest point of the ridge in the south- central portion of the site. About 85 percent of the site contains slopes 15 percent or less (15 feet in vertical drop per 100 feet horizontally), and about 5 percent contains. slopes greater than 25 percent. The balance of the site contains slopes between 15 and 25 percent. Potential Impacts Grading impacts will be minimal, as typical grading is proposed for various portions of the road, as well as for house locations and other project components, such as stormwater basins, etc. No proposed grading will exceed 3:1 slopes, and such grading will be used in order to minimize the total grading area in the context of the overall site. The proposed grading is designed to direct runoff to drainage structures and measures. Propos W Mitigation Measures Mitigation will come from minimizing the amount of area that is to be graded, in order to minimize the total Limit of Disturbance area on the project site. Mitigation also comes - from the Average Density Plan itself, which proposes a smaller Limit of Disturbance Area than the Cluster Subdivision Plan as well as the original 94 -lot Subdivision. Morris Associates November 9, 2007 F:Wocumenrsl GeneraA2005QV51511E1SICURRENT DEIS FOR BROOKVALE OCT 20071DE1S NOVEMBER 2007 SUBAIMSION.doc Brookvale Subdivision Page 14 DraFi F,nvironnrenial Impact Slalemenl 1.2.7 Vegetation and Wildlife Potential Im acts - Ve etation As the result of the construction activities, a considerable amount of the existing site vegetation will be disturbed. This disturbance has the potential to impact existing wildlife as well as add to stormwater runoff. Mitigation Measures - Vegetation The greatest mitigation measure is the Average Density Subdivision design itself, which conserves more open space and minimizes the amount of landscaped lawn area on the site, when compared to the "As -of -Right" conventional residential alternative or the original 94 -lot layout, thereby reducing impacts to the on-site stream and surrounding water bodies, Vegetation removal in the proposed development area will be mitigated with landscaping around the proposed homes and roadways. A detailed landscaping plan will be finalized prior to the final subdivision approval. The plan utilizes a mixture of ornamental and native species, many of which provide wildlife value, including food and nesting opportunities. Erosion and sedimentation controls will be utilized during construction activities until the disturbed areas are fully developed or soils have been stabilized through vegetative plantings. Potential IM12acts -Wildlife .General impacts to fauna as a result of the proposed project may result from the removal of existing vegetation, establishment of new vegetation types, and the loss of individual animal species during the land clearing and construction phases. Land clearing activities may ected to be lostmobile tospecies move to areasrelocate on hesite, site nwhile ot affec edmobile by species would be expp development. The proposed project will result in the loss of habitat primarily in common and abundant wildlife species such as white tail deer, gray squirrels, and cottontail rabbits, songbirds, etc. Land clearing activities may impact wildlife species by the loss of nesting, breeding, and feeding areas. Some `nmammalstfd may season or when young are beingnce impacts from reared. if construction occurs during g Morris Associates November 9, 2007 R 20W SUBMISSIQN iac E: Wocumenis ICeneraA200512051511EIMCURRF,NT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBE Brookvale Subdivision Page 15 Drafi Environmental 6upa6i Slalemeni Mitigation Measures — Wildlife Once again, the greatest mitigation measure for wildlife impacts generated by the proposed project is the design of the Average Density Subdivision plan, which, when compared to the "As -of -Right" conventional residential alternative or the original 94 -lot layout, conserves a diversity of existing vegetation and wildlife habitat, including wetlands. No critical habitat essential for the survival and/or existence of any rare, endangered, or threatened species has been identified on site, and consequently, no impacts to these species are expected to occur as a result of the proposed subdivision. See section 3.7 for Vegetation and Wildlife Impact Analysis. Morris Associates November 9, 2007 E:WocumenislGen era112005W51511EISICURRENT DEIS FOR BROOKVALE OCT20MDEI3 NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision page 16 Drag Environmental Impact Statement 1.2.8 Utilities and Services Potential Impacts Water Service Water service will be provided to the subdivision by connecting to existing municipal water systems from Ervin Drive, Fieldstone Boulevard and Spook Hill Road, creating a looped system. Wastewater Wastewater services will be provided to the subdivision by connecting to the existing municipal wastewater system at Spook Hill Road. This proposed wastewater system involves the construction of a pump station along the proposed road in order to allow wastewater flow to get into the existing sewer on Spook Hill Road. A potential alternative involves connecting the proposed sewer with existing sewer at Ervin Drive by gravity. Flow would then travel to the Kent Road pump station, which would be upgraded to accommodate the flow produced by the Brookvale Subdivision adequately. In all instances, wastewater will be ultimately conveyed to the Tri -Municipal Sewage Treatment Plant and then discharged to the Hudson River. Note that the sanitary sewer collection system will transport only sanitary sewer flows, not stormwater. At this time, adequate capacity exists to serve the subdivision. Mitigation Measures The main mitigation measure taken is in the Average Density Plan itself. When compared with the original proposed 94 -lot subdivision, the Average Density subdivision will require less water to service the residents, and produce less wastewater/solid waste. Water Service Water will be conveyed to the site by municipal service, and adequate capacity, pressure and flows exist to serve the subdivision. Morris Associates November 9, 2007 E: Uocuments)Genel'ai12005120515I1 YCURRENT DEIS F'OR BROOKVAGE OCT 20071DEIS NOVEMBFR 2007 SUBMISSION -doe Brooki,ale Sandivision Draft EnWronniendalInipactStatement Page 1 Wastewater The expense of the operation and maintenance of the sewage treatment facilities will be paid through sewer use fees charged to the residents. The fee schedule is computed quarterly, and is approximately $95.00 per household'. Wastewater flow volume will be partially mitigated through the use of water -saving devices installed in the houses in the subdivision. Further discussion of the proposed utilities can be found in Section 3.8. ' As per phone conversation with Camo Pollution on October 5, 2006_ Amount based on fee per household in the immediate area of the proposed subdivision, Morris Associates November 9, 2007 F. VoctimenlsWeneraA200512051511EMCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 18 Draft Environmental Impacd S'tulernenG 1.2.9 Community Facilities Potential Impacts - Police Services When fully occupied, the Brookvale Subdivision is projected to increase the existing population of the Town of Wappinger by approximately 200 persons. However, while an increase in demand may be placed on police services, the proposed project is similar to the surrounding land uses and is unlikely to generate unique or unusual public safety considerations. Both the Dutchess County Sheriff's Department and the New York State Police were contacted with respect to the proposed project. Both agencies expect that they will be able to adequately handle the increased demand from the project with existing staff and equipment. The Sheriff's Department operates a substation at the Dutchess County Airport, roughly four miles from the project site. The New York State Pole currentless than operate a substation located on Middlebush Road in the Town of Wappinger, three miles from the project site. Potential impacts —Fire and merclency Medical Services The New Hackensack Fire District maintains a force of both paid, full-time and volunteer, part-time personnel. The recently expanded fire station at the intersection of Myers Corners Road and All Angels Hill Road will serve the site in time of need. The proposed subdivision is expected to generate approximately 200 new residents in the Town of Wappinger. As this residential subdivision is similar to existing land uses in the area, it is unlikely that the Brookvale Subdivision will create unique or unusual public safety considerations. It is also anticipated that some of the new residents from the subdivision may volunteer with the New Hackensack Fire District, thereby providing additional support for Fire and EMS services to all residents of the Town. The New Hackensack Fire Department was contacted with respect to the proposed project. They expect that they will be able to adequately handle the increased demand from the project with existing staff and equipment. Therefore, the proposed project is not anticipated to have a significant impact on the Fire District or on the EMS protection services offered to the residents of the Town of Wappinger. Potential Impacts -- Recreational Facilities It is estimated that the proposed subdivision will introduce 200 new residents into the Town of Wappinger, which will place additional but not adverse demands on local recreational facilities. Morris Associates November 9, 2007 F.: Idocumentsl Geneta112005120515I tEISICURRENT DEIS FOR BROOKVALF OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale. Subdivision Page 19 Draft F,rrviroamental Impact Slalemeul Potential Impacts — Schools It is assumed that the majority of school age children generated by the project will attend public school, although some likely will attend parochial and private schools. This will impact the Wappinger Central School District (WCSD). There are currently 15 schools within the WCSD, including 2 high schools, 2 middle schools, 10 elementary schools and 1 alternative high school. The proposed subdivision will directly impact Myers Corners Elementary School, Wappingers Junior High School and Roy Ketcham High School, among several other less impacted private schools. Potential Impacts — General Government As a result of the proposed project, the population of the Town of Wappinger is expected to increase slightly over the course of a few years. These new residents, some of who may already live elsewhere in the Town, will increase the demand for municipal services, such as road maintenance, recreational needs, and animal control. In addition, it is likely that the need for services such as tax collection and permit issuance will also increase. Mitigation Measures — Community Facilities The greatest mitigation measure to impacts generated by the proposed project is the design of the Average Density Subdivision plan, which, when compared to the original 94 -lot layout, will require and utilize less in community services. However, regardless of the number of lots produced by the Brookvale Subdivision, none of the community services or facilities contacted expressed concern that it would create any adverse impacts. Many of the community facilities were already aware from the original 94 -lot subdivision that new homes and additional residents were going to be introduced to the town and have accounted for it accordingly. Impacts will also be mitigated by the fact that new residents will be added to the community gradually, as the proposed project will take place over a period of approximately three to five years. Further discussion of all of the community services impacts can be found in Section 3.9. Morris Associates November 9, 2007 E.IdocumenlslGeneraA2005120575 1YEfMCURRENT DEIS FOR BROOKVALE OC7'M071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale. Subdivision Draft Fnvironmental Impact Statement Page 20 1.2.10 Cultural Resources Potential Impacts According to the New York State Parks, Recreation and Historic Preservation National Register Listing, no part of the proposed Brookvale Subdivision is located in an archaeologically sensitive area. In the northern corner of the proposed subdivision, there is a small (1,800 S.F.) cemetery that dates back to 1757. In both the conventional and average density subdivision plans, this cemetery will remain preserved. In the conventional subdivision plan, the cemetery will be given its own parcel. Mitigation Measures In both the conventional and average density subdivision plans, this cemetery will remain preserved. In the conventional subdivision plan, the cemetery will be given its own parcel, and in the Average Density plan, a Conservation Easement will be added to protect the entire cemetery area from being disturbed. See Section 3.10 for Cultural Resources Impact Analysis. Morris Associates November 9, 2007 ErldocumenlslGeneralti20051205IS1IE00URRENTDEIS FOR BROOKVALE OCT 20070EIS NOVEMBF,R 2007 SUBMISSION -doe Brookvale Subdivision Page 21 i)rar Fnvironmentallmpad Statement 1.2.11 Economic and Fiscal Impacts Potential Im acts Economic Impacts from the proposed subdivision will come both during and after construction. For the duration of construction activities, some of the local commercial and retail businesses will benefit through the demand for construction materials and construction labor. The population generated by the subdivision will be introduced gradually over the next three to five years and over that period of time impacts to both emergency services and the Wappinger Central School District will also be gradual. As a result, the population increase will increase the cost to provide these services. Economic Impacts will also be felt once construction is completed, as the Brookva4e Subdivision can be expected to generate sales revenue to retail establishments in the local area. Mitigation Measures The proposed project will produce long-term economic ed for D tithe ebenefits with respect Couto the tax revenues from the property. Tax revenues will be gen Town of Wappinger, the New Hackensack Fire District, Ambulance Services and the Wappinger Central School District, among several other smaller scale services. In addition to increased tax revenue, the number of projected new residents living in the Brookvale Subdivision will provide additional revenues to local businesses through purchases made at local businesses. Morris Associates November 9, 2007 E:• doaimenislGeneraA2005120515IlEMCURRENT GEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision IUr•alt Envlronmentallmpact Statement Page 22 1.2.12 Air Quality and Noise Potential Impacts Both during and after construction of the proposed site, air quality and noise impacts will be created. During the proposed construction, air quality impacts and noise will be introduced to the area from the construction machinery and equipment being used. Contributions to this impact may come from blasting and/or utilization of hydraulic hammers for the purpose of rock removal. Following construction, impacts will be minimal, with air quality being impacted by the automobiles being driven through the subdivision and noise impacts coming from the ambient noise produced from those living in the subdivision. Mitigation Measures The main mitigation measure taken is in the Average Density Plan itself. When compared with the original proposed 94 -lot subdivision, the Average Density subdivision will produce less impact to air quality. During construction, heavy construction equipment will be fitted with appropriate mufflers to reduce noise levels as much as is reasonable during operation. Construction activities will be undertaken only during daytime hours, and will comply with noise and air emissions standards in accordance with public regulations. The short-term construction impacts to air quality will be mitigated to comply with all applicable emissions rates allowed by New York State Law. Compliance with emissions standards can be assured with the use of properly maintained, modern equipment. See Section 3.12 for the full Air Quality and Noise Impact Analysis. Morris Associates November 9, 2007 E: IdocumentskGenera11100512051511 EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMlSSION.doc Brookuale Subdivision Draft Environutental Impact Statement 1.3 List of Involved Agencies Page 23 In addition to the Lead Agency's responsibility for issuing subdivision approval, the following Agencies have been identified as being responsible for issuing permits, approvals and authorizations relative to the proposed project: AGENCY Town of Wappinger Town Board Wappinger Town Hall 20 Middlebush Road Wappingers Falls, NY 12590 Town of Wappinger Planning Board 20 Middlebush Road Wappingers Falls, NY 12590 Town of Wappinger Highway Supt. 20 Middlebush Road Wappingers Falls, NY 12590 Dutchess County Department of Health 387 Main Street Poughkeepsie, NY 12601 NYSDEC Region 3 Office 21 South Putt Corners Road New Paltz, NY 12561 Town of Wappinger Building Department 20 Middlebush Road Wappinger Falls, NY 12590 PERMIT/APPROVAL Acceptance of Roads and ROW Acceptance of Land Dedications Authorization of Water & Sewer Subdivision Approval Road Acceptance Access Permit for Entrance Road from Spook Hill Road Access Permit for Emerg, Access Road from Fieldstone Blvd. Water Distribution System Sewage Collection Systein Subdivision Approval State Pollution Discharge Elimination System (SPDES) Permit Blasting Permit Morris Associales November 9, 2007 E, idocumentslGenei,at2011512I151511EISICURREN7'DEIS FOR BROOKVALE OCT NO70EIS NOVEMBER 2007 SUBAIISS10N.doe Brooirnaie Subdivision Draf l l;nviroamen ial Cmpact Statement 1.4 List of Interested Agencies Mr. Joseph Ruggiero, Supervisor Wappinger Town Hall 20 Middlebush Road Wappingers Falls, NY 12590 Joseph E. Paggi, Jr., P.E. Town of Wappinger Town Engineer Paggi and Martin, LLP 54-56 Main Street Poughkeepsie, NY 12601 David Stolman, AICP, PP New Hackensack Fire District Town of Wappinger Planning Consultant c/o Wappinger Town Hall Frederick P. Clark Associates, Inc. 20 Middlebush Road 350 Theodore Fremd Avenue Wappingers Falls, NY 12590 Rye, New York 10580 NYSDEC Division of Regulatory Affairs 625 Broadway Albany, NY 12233 NYS OPRHP Historic Preservation Field Services Bureau Peebles Island, PO Box 189 Waterford, NY 12188-0189 Page 24 NYSDEC Central Office, Commissioner of NYSDEC 615 Broadway Albany, NY 12233-0001 Army Corps of Engineers New York District, Regulatory Branch - Room 1937 26 Federal Plaza New York, NY 10278-0090 Dutchess County Dept. of Planning & Development 27 High Street Poughkeepsie, NY 12601 Wappingers Central School District Superintendent of Schools 15 Meyers Corners Road Wappingers Falls, NY 12590 Morris Associates November 9, 2007 E: IdocumenlstGenera112005120515IWYCURRENT DEIS FOR BROOICVRLE OCT 200710EIS NOVEMBER 2007 SUBMISSION,doe Brookvale Subdivision Page 25 Draft Environmentallmpaet Statement 1.5 Summary of Project Alternatives As required by the New York State Environmental Quality Review Act and the Final Scoping Document adopted October 17, 2002, the Applicant analyzed three different alternatives to the project that include: 1) "No Action," 2) "As -of- Right" conventional subdivision, and 3) an Average Density Subdivision. 1.5.1 No Build The "No Build" alternative means that the site would remain vacant and no residential development or recreational improvements would occur. This alternative is not consistent with the objectives of the Applicant or with town zoning. 1.5.2 As -of -Right Subdivision The As -of -Right subdivision provides 54 single-family homes (see Figure 1.1-5, "As -of - Right" Subdivision). This layout utilizes two separate proposed roads; the first referred to as "Road A", an approximately 4,950 -foot road, which accesses 49 houses in the subdivision from Spook Hill Road. The other proposed road, referred to as "Road U, accesses the subdivisions via an extension of Ervin Drive, which will be extended approximately 300 feet in order to access the remaining five homes in the subdivision. The configuration of the single-family homes in the "As -of -Right" layout differs from the Average Density subdivision in that there are two proposed roads. Also, the "As -of - Right" layout requires more clearing and site disturbance than the preferred alternative. Wooded areas and steep slopes would be disturbed and land would not be dedicated to the Town. This alternative is not consistent with the objectives of the Applicant. 1.5.3 Average Density Subdivision The average density subdivision provides 54 single-family homes (see Figure 1.1-6 Average Density Subdivision). This layout utilizes only one proposed road, approximately 4,625 feet in length, and also creates a series of conservation easements to ensure the protection of all on-site wetlands. This alternative is the one currently being proposed by the applicant, and is the focus of this DEIS. 1.5.4 Alternate Means of Access (Ervin & Fieldstone connections) Two alternative access ways were explored for the subdivision, an extension of Ervin Drive, and an extension of Fieldstone Boulevard. Due to existing wetland conditions, as well as potential impacts on current traffic conditions, a new road will be built to access the proposed 54 lots. Instead, the Fieldstone Boulevard alternative access will be Morris Associates November 9, 2007 E:ldoctttnentsiGenera1120t)512l1515I1EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Fnvironmental Impact SMIement Page 2h proposed as an emergency access that residents of both the proposed Brookvale Subdivision and the connecting residential development will be able to use. Morris Associates November 9, 2007 E.IdocumenislGenerall20l15i20515I TISICURRBNT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBNIISSION.doc Brookvale Subdivision page 27 Draft Environmental In+pact Slatemend 2.0 DESCRIPTION OF THE PROPOSED ACTION 2.1 Introduction The project site is located in the east central section of the Town of Wappinger in Dutchess County, New York. The tax map number of the parcel is 135689-6257-01- 260870. The property is a parcel totaling 89.51 acres in size and is situated on the east side of Spook Hill Road between Myers Corners Road and Old Hopewell Road. The property is in the R-40 zoning district (see zoning map, Figure 1.1-4). The R-40 district is defined in §240-7 — Rational ehntent of various district designations as follows: "These zones cover either existing developed areas outside the proposed regional sewer system service area, areas within the proposed regional sewer system service area or small undeveloped tracts in transitional areas adjacent to higher density developments (such as Chelsea). If within the proposed sewer service area, these sites should only be developed if tie-ins to the regional system are provided." The parcel is surrounded on three sides by the R-20 District, which is defined as "Areas that have already been fully developed at this overall density." The parcel is generally rectangular in shape, surrounded by neighborhoods of single-family residences. The proposed BrookvaVe subdivision is for 54 lots, to stohbe,ce nsatFuectad single --n two pfamilys9detached depicted entirely on one filed map. The0 p P residential dwelling units. The subdivision is being proposed as an Average Density Subdivision, which will allow the applicant to construct lots that comply with R-20 zoning, as long as the average size of all proposed lots exceeds the minimum lot size requirement of the R-40 zoning district. The procedure for an Average Density Subdivision 240appplicat d ficprov de ofn the Lot Town of Wappinger Subdivision Regulations, Requirements," paragraph A, entitled "Average Density Subdivision", which can also be viewed on page 36 of this document. 278itional can benformation found starting the at page 37ght" lot of this count plan in compliance with document. Currently, the project site is composed of a mix of forested areas and wetlands, and the surrounding areas consist of single-family homes, as well as a small park several hundred feet northwest of the proposed subdivision on Spook Hill Road. The project site does not contain a significant amount of steep slopes as defined in §240-32B of the Town Code, a portion of which states "For purposes of this section, steep slopes shall be considered to be those areas with an average slope in excess of 25% over a horizontal distance of 100 feet or more." There are two north/south running areas in the southern portion of the site that qualify as steep slopes that continue south into lands under ownership of the Town of Wappinger. One area contains a portion of the proposed road and portions of Lots 31, Morris Associates November 9, 2007 E:• documenlslGenerall200512051511EISICURRENT UEIS FOR BROOKWE OCT 2007WEIS NOVEMBER 2007 SUBMISSION.doe Brookvale Subdivision Page 28 Draft Environmental lmpact'Statement 32, 55 and 56. This steep slope area will be graded to accommodate the road, but no houses will be within the steep slopes. It is not possible to avoid developing this portion of the parcel due to the significant he other area hat qualifies ands and las0steep adjacent slopes willremain in the western portion of the site. untouched and falls within the rear yards of Lots 8 and 9. There is one proposed access way, and one emergency access way to the proposed subdivision. The proposed access intersects with Spook Hill Road. Emergency access will be provided through an extension of the cul-de-sac on Fieldstone Road, an existing road in adjacent subdivisions. Pro'ect Purpose, Public Need and Benefit to the Town The Average Density Subdivision Pian (Figure 1.1-6) shows 54 single-family homes. This subdivision layout will allow for the same amount of lots as a Conventional Subdivision, but will minimize lot size, which will limit the disturbance of land while preserving more land, especially on-site wetlands through conservation easements. Given the high demand for housing opportunities throughout the Hudson Valley area, the market for single-family units is likely to remain favorable for the foreseeable future. This is especially true for units with quick and easy access to regional roadways, such as Route 9. The proposed project is expected to generate the annualized full-time equivalent of approximately 40 on-site temporary construction labor jobs. The majority of the construction -related employees at the site are expected to come from Wappinger and the immediate surrounding area. These workers are expected to have a positive impact on existing local businesses by purchasing food, gasoline, and other goods and services. The proposed project will produce long-term economic benefits with respect to tax revenues, which are discussed in more depth in Section 3.11 of this document. In addition to increased tax revenue, the additional disposable income brought into the Town and the County by virtue of the residents living in the proposed Brookvale Subdivision will provide an additional revenue source through spending by these families in local area businesses. Objectives of the Project Sponsor The Applicant's objectives are to accomplish the following: Increase the Town's forock of su h u git by quality provid ng single-family 54 high qual9yu single - and fam single-family help satisfy the demand residential homes. Morris Associates November 9, 2007 E:IdocumenlslGeneraA2005i20515I1EIMCURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impact Statement 29 ■ Provide increased housing opportunities in an area of the Town well suited to support such land use, especially its central location and proximity to existing transportation networks and infrastructure. ■ Create a viable project compatible with the character of the site and surrounding area. ■ Protect the significant environmental features within the site boundaries. ■ Create an aesthetically pleasing community where residents will appreciate the opportunities to live, work and play in the Town of Wappinger. Protect Background and Site History The property previously received amended preliminary subdivision approval on August 16, 1993 for a proposal consisting of 94 lots. An Environmental Impact Statement (EIS) was prepared and a Findings Statement was issued by the Lead Agency (Town of Wappinger Planning Board) prior to that approval. This DEIS for the current Brookvale Subdivision proposal includes, where applicable, portions of the prior DEIS (See Appendix 6.2) in accordance with the current final scoping document adopted by the Town of Wappinger Planning Board. { In 1993, at the time of the review of the prior proposal for the 94 lot plan, the majority of the property was zoned R-20, with only a portion of the land zoned R-40. The project did not go forward to final approval, mainly due to the fact that water and sewer service from the Town was not available, even though the property was located in established water and sewer districts. Since that time, several changes have occurred that affect the potential development of the property: The zoning of the entire property has been changed from R-20 to R-40, which requires that the parcel can only be developed if tie-ins to the regional sewer service system are provided, according to Town Code §240-7. 2. United States Army Corps of Engineers (USAGE) wetland laws, as well as more recently, the Town of Wappinger wetlands regulations, came into effect. These laws regulate activities affecting freshwater wetlands and in the case of the Town's regulations, a 100' wide buffer area adjacent to freshwater wetlands was established by Town ordinance. 3. Sewer is currently available on Spook Hill Road. 4. The Brookvale project that was previously approved called for dedication of a portion of land to the Town of Wappinger to re -align Spook Hill Road through an Morris Associates November 9, 2007 E: Idocumenis I Generat 1200512051511 SISI CURRENT DEIS FOR BROOKVALE OCT 20071 DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Drgfl Enviromnenlal Impact Statement Page 30 area that is now designated as NYSDEC wetlands, Army Corps wetlands and Town of Wappinger wetlands. �n this applicationavoan ctfo� dthe evelapmentdsof the this realignment is not being proposed Brookvale parcel. Michael Nowicki of Ecological Solutions mapped the wetlands. The wetlands were first delineated in May of 2003 and verified and re -delineated per the Town of Wappinger Code in July of 2005. Heather Gierloff of the NYSDEC verified the 2005 delineation on February 2, 2007 as indicated on a map dated October 11, the 2006. The USACE was s the Town ofted to Wappingerylocal wetla ds orCorps dinance smo e Engineers wetlands, a stringent regarding adjacent areas, which more than encompasses the Army Corps wetlands. Chris Holme and Jill Slankas of F,P. Clarke Associates, Inc. identified the town wetlands with Michael Nowicki. This information has been noted on the subdivision plans. The wetland mapping was performed according to the 1989 Federal Wetlands Manual criteria that were adopted by the Wappinger Town Board ase e delineat on have been submitted with thecriteria for the Town's wetland tsoubdivD o sheets compiled during th n application. 5. New York State Department of Environmental Conservation (NYSDEC) storm - water regulations, known as NYSDEC Stormwater Phase 2 regulations, are now in effect. These regulations require not only storm water detention facilities, which were provided for in the 1992 application, but also stormwater quality management areas, designed to treat stormwater before it is discharged. These requirements for stormwater quality basins require use of more land areas for stormwater management than was previously required. For this DEIS, the Town of Wappinger Planning Board has agreed on the 54 -lot As - of -Right lot count, based on the Conventional layout for the Brookvale Subdivision. Conformance to Town Master Plan The Brookvale Subdivision complies with and is consistent with the following Goals and Objectives of both the current (1988) Town of Wappinger Master Plan and the proposed 2006 Town Master Plan: 1. Goal Preserve the stability and character of the community. Objectives: Encourage the development of an attractive environment for living, working and playing. The applicant will develop the site with a tasteful mix of housing styles and finishes. Morris Associates November 9, 2007 E:)dociumenlslGenerah20051205151lF,ISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision orart Environmental 1"Paat Slalement Page 31 Foster a sense of community identity. The average density layout will be conducive to creating a unique sense of place where people will be able to connect and interact with each other. 2. Goals Achieve a growth pattern that calls on each development to make a positive contribution to the community. There will be a significant amount of open space created that will be conserved by means of conservation easements. Develop a living environment that is visually pleasing as well as functionally efficient. The developer will integrate various housing styles to create aesthetic appeal for the residents. Objectives: Accept a type and rate of growth that will allow the town to provide a consistent and adequate Level of services as growth occurs. The project buildout will occur over a period of three to five years, allowing new residents to be assimilated into the community gradually. Use the SEQRA process to identify all of the anticipated impacts of proposed new developments. The applicant has carefully reviewed the potential impacts and has addressed them to the maximum degree possible. Provide a well-planned, coordinated system of water and sewerage utility services to prevent environmental deterioration and provide for future development. The applicant will connect to existing water and sewer facilities, thereby eliminating potential environmental deterioration. Regulate the density of residential and non-residential development in accordance with available water and sewer systems. The current proposal anticipates 54 lots as opposed to the prior approved 94 lots and will not overburden the municipal water and sewer systems. 3. Goal Encourage high quality development to provide a visual and natural environment that will promote economic stability and growth and will be compatible with surrounding land uses. Objectives: Encourage the use of varied architectural styles in new residential areas. Varied architectural styles are proposed. Utilize development techniques that provide for the clustering of structures to preserve open space and achieve a compatible relationship among different community areas. The average density layout preserves open Morris Associates November 9, 2007 E: idocumenlslGenerah200512051511EISICURRENT DEIS FOR BROOKVALE OCT 20071DEiS NOVEMBER 2007 SUBMISSiON.doc Brook -vale Subdivision Page 32 Draft Environmental Impact Slatemenl space, clusters the housing in the most appropriate areas and achieves compatibility within the development. Limit the use of a property to what the property size can support. The current 54 lot proposal is significantly less than the prior approved 94 lots. Protect natural landforms, including floodplains, wetlands of all sizes, and steep slopes. Floodplains, wetlands, adjacent wetland areas and steep slopes will be protected. Ensure that the architecture of proposed new structures enhances the character of the town. The housing styles are in keeping with styles found throughout the town. 4. Goal Encourage high quality aesthetics throughout the town. The project, when completed, will be aesthetically pleasing. Objectives: Topsoil should be retained. Topsoil will be stockpiled and re -used for lawns. New utility lines should be constructed underground. Utility lines will be installed underground. in residential areas, the setbacks of buildings should be varied. Building setbacks will be varied to the degree possible. 7. Goal Encourage the provision of a range of housing types and styles to meet a wide variety of housing needs. A range of housing types is proposed. Objectives. Include a variety of housing types in large, new developments. A variety of styles will be offered. Concentrate new residential development in areas that can be most economically served by new roads and extensions of utilities and community facilities. The development will be accessed from existing an existing road that can accommodate the new traffic from the development. Ensure that housing densities reflect required services and amenities. Service providers can accommodate the project density. 8. Goal Encourage the preservation of environmentally significant features. Various environmentally significant features will be preserved. Morris Associates November 9, 2007 E: doccanenlslGeneraA2005120515I1E1SICURRENT DEIS FOR BROOKWE OCT 2007W,13 NOVEMBER 2007 Si1BMISSIONdoc 33 Brookvale Subdivision Drag Environmental Impact Statement Objectives: Regulate the development of lotoplr,wetdpofesadidge lines to ensure minimal disruption of wetlands, ns from floodplains, scenic qualities. Development will be away wetlands, adjacent wetland areas, steep slopes and ridgelines. Promote a land use pattern that preserves the quality a n er artit s f the town's surface and groundwater resources. Municipal er services will be provided, thereby preserving the quality and quantity of existing site surface and groundwater resources. Protect natural drainage patterns by regulating flood -prone areas, controlling runoff rates and volumes, system s'anw II �regrulatern unofflandsThe rates .and stormwater management volumes and will protect wetlands. 10. Goal Encourage the development of a transportation system consistent oad with town land use and development patterns. The existing network will be utilized for site access in keeping with current development patterns. Objectives: Minimize the number of access p with °an afemand ncyctor accesss point access point is prop proposed. use cluster development to minimize the construction of new roads. The current layout clusters the housing to the degree possible. 12. Goal Develop a town -wide sewage management and water supply program. Objectives: Link development in growth areas einotohe �st ng m lanned provisionnipal water atnd sewer ension of central sewerage systems. The project w facilities. It should be noted that the Applicant's objectives meet a number of the Goals t Master Plan, and Objectives of the currencodesign'.Eight orated into the andlayoutcon concepts twelve Goals are recognized as beteg incorporated of the proposed Brookvale Subdivision. 1t should be noted that the remaining Goals Ga ID Objectives ft#he1Town of tWappinger n do not pertain to the Brookvale Subdivision. Master Plan deal with retail and commercial development, neither of which are components of this project. Morris Associates November 9, 2007 E: ldecumentslGeneral1200512051511EISICURREN7, DEIS FOR BROOKVAGE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Drag L11vlronmental Impact Statement Conformance to Propose 12006 Master Pian 34 The proposed Town of Wappinger Comprehensive Plan states in the Introduction that it "is a document that reflects the hopes and expectations of the people of Wapp g with specific objectives and recommendations about how to guide growth so as to preserve important environmental resources and improve the quality of life of the residents, workers and visitors in the community." The plan examines the following key areas on concern: Environmental Resources - Population and Housin ■ Economic Base ■ Communit A earance and Character ■ Transportation ■ Water SUPPly and Sewa a Treatment ■ Recreation and Communit facilities ■ Land Use Each of the above referenced areas of concern is explored in depth in sections entitled inventory and Analysis, Issues and Opportunities, Goals and Objectives, and implementation. The overall analysis of each area is bolstered by reports andstudies conducted by the Town's planning consultant firm, as well as by surveys, public Appeals. input and involvement of the Town Board, Planning Board and zoning Board of App The Brookvale Subdivision meets many of the goals and objectives of the master plan, as referenced below. • Establishes and preserves open space ■ Minimizes development impacts to floodplains, wetlands, stream corridors and steep slopes ■ Promotes water -saving systems ■ Protects surface water quality ■ Develops central utilities for water and sewer Morris Associates November 9, 2007 E: IdocitmentslOeneraA100511051511EISICURRENT DEIS FOR BROOKYALE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impao! Slalemenl Page 3.5 ■ Encourages high-density development in an area that can be most economically served by existing roads and utilities ■ Protects a small existing old cemetery located on the site • Minimizes the number of access points on a collector road ■ Continues the development of central water and sewer facilities to achieve land use goals ■ Will contribute to upgrading and maintaining existing recreation facilities through the payment of recreation fees ■ Will encourage new residents to cooperate in recycling efforts Conformance to Town of Wappinger Zoning Code As mentioned previously, the project site is composed of one parcel totaling approximately 89.51 acres and is zoned in the R-40 District. The R-40 District was established to provide for single-family residential dwellings in a manner that fosters conservation of open spaces and preservation of rural character. According to the Town Code of the Town of Wappinger, Chapter 240, Zoning, Schedule of Use Regulations, single-family homes are permitted in this zone. Bulk requirements for the R-40 Zoning District are defined by the Town Code Chapter 240, Zoning, "Schedule of Area and Bulk Regulations." Table 2-1-1 R-40 Zoning District Area & Bulk Requirements Zoning Requirements Standard R-40 Zoning District Requirements Minimum lot size Minimum lot width Minimum lot deptl- Minimum required yard setbacks: Front Side Back Zoning Modifications 40,000 square feet 125 feet 125 feet 50 feet 25 feet 50 feet The procedure for an Average Density Subdivision application is provided in the Town of Wappinger Subdivision Regulations, § 240-19, "Modification of Lot Requirements," paragraph A, entitled "Average Density Subdivision." Morris Associates November 9, 2007 E.ldocumenislGeneraA200512051511EISlCURRENT DBIS FOR BROOKVAGE OCT 20071DEIS NOVEMBER 2007 SUHAIISSION.doc Brookvate Subdivision Draft Frivironmental impact Statement 36 § 240-19 Modification of Lot Requirements. For the purposes set forth earlier in this chapter and to promote natural resource preservation and conservation and to minimize the construction and maintenance costs of community facilities and utilities, all directed towards the objective of fostering and obtaining land development of good quality and design at reasonable economic cost, the Planning Board is hereby authorized to review and act upon all subdivisions in accordance with the following provisions. In all cases, the Planning Board shall have the full power of subdivision approval, approval with conditions or denial, as authorized by the Town Law. A. Average density subdivisions. Simultaneously with the approval of a subdivision plat and pursuant to § 278 of the Town Law, at the request of the applicant, the Planning Board is authorized to modify the zoning regulations with respect to lot area and dimensions, provided that the average size of all lots shown on the subdivision plat shall be equal to or greater than the permitted minimum lot area in such district and that there shall not be a greater average density of population or cover of the land with buildings than is permitted in such district, and further provided that no lot shalt have less than the minimum area and dimensions required for lots in the next less restrictive residential zoning district to the one in which the property is located. For the purpose of this section, average density shall be determined by the number of ane -fatuity residences which could be built under the zoning district standards in full conformity with the Town's Subdivision Regulations Editor's Note: See Ch. 217, Subdivision of Land, and all other applicable requirements. The basis for determination by the Planning Board shall be a conventional subdivision sketch layout for the subject property. Thus, the changes district, • dimension requirements to those of the next less restrictive the R-20 district. That ri has the following zoning requirements: Table 2.1-2 R-20 Zoning District Area & Bulk Requirements Zoning Requirements Standard R-20 Zoning District Requirements Minimum lot size 20,000 square feet Minimum lot width 100 feet Minimum lot depth 125 feet Minimum required yard setbacks: 35 feet Front Side 20 feet Back 40 feet Morris Associates November 9, 2007 .doc E: idocumentsVGeneraA2005)2051511 FIYCURRENT DEIS FOR RROOKVALF OCT 20071DEiS NOVEMBER 2007 SUBMISSiON Brookvale Subdivision .Page 37 Draft Ewvironmental 6npaci Stalemenf The proposed Average Density subdivision complies with the requirements set in place by § 240-19-A of the Town of Wappinger Zoning Code. 2.2 Project Description The proposed Brookvale subdivision is for 54 lots to be constructed in two phases. The proposed homes are all single-family detached residential dwelling units. The first phase of house construction will proceed to the end of the temporary cul-de-sac shown on the project drawings and will incorporate Lots 19 through 42. The second phase will involve the removal of the temporary cul-de-sac, continuation of the road to its terminus at Lot 1, development of Lots 1 through 18 and Lots 43 to 54, and the creation of the emergency access to Fieldstone Boulevard. Due to the change in wetland regulations that have occurred since the 94 -lot proposal, the current proposal leaves as untouched a significant land. area that includes Wetlands Al, A2 and B and their 100 -foot adjacent buffer areas. These extensive areas will remain undeveloped and no disturbance will occur in the wetlands or adjacent areas. There will be clearing and removal of trees and vegetation to create Stormwater Management Basins 1A and 1B, which is unavoidable. Existing vegetation and trees within these areas will be preserved. Conservation easements will be established to assure proper preservation of the trees. The wetland and buffer areas form a significant screening of the development from Spook Hill Road and several residences to the north. Portions of rear yards of some of the lots will remain untouched during construction. Drawing No. 11 of 16, entitled "Preliminary Sediment and Erosion control Plan" indicates the areas that will not be disturbed during construction. The Average Density plan creates a more compact residential layout design when compared with the alternative "As -of -Right" Subdivision, and more importantly, allows for conservation of more open space (particularly on-site wetlands) through proposed conservation easements. There is also roughly 625 fewer linear feet of new road than that proposed for the prior approved project. Also, driveways are relatively shorter, which leads to a reduced amount of impervious surfaces. For a breakdown of the differences in disturbance areas between the preferred Average Density subdivision and the "As -of -Right" subdivision, see Tables 2.2-1 and 2.2-2 on the following page. There is one proposed access drive into the development and one emergency access connection to the proposed subdivision. Therefore, there is only one internal true route that all vehicles will follow. Site access for the proposed subdivision is proposed via a two-lane access road connection to Spook Hill Road. The site access will be "stop" sign controlled. The proposed road will be approximately 4,625 LF, with a cul-de-sac at the end of the road. No additional outlets are proposed. An emergency access drive will be provided through an extension of the cul-de-sac on Fieldstone Boulevard, an existing road in an adjacent subdivision. The proposed subdivision will not have sidewalks. Each single-family lot within the subdivision will have its own driveway. There are no shared driveways. Morris Associates November 9, 2007 E: Idocumentsl Genera112005110515 / 1FMCURRENT DEIS FOR BROOK VALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 38 nrnfr Fnvironmentallninact Statement _ The project site is situated on Spook Hili Road, which runs between Old Hopewell Road and Myers corners Road, both the which intersect with Route 9. There is easy access to the development for service vehicles coming from Wappinger, Poughkeepsie, Fishkill and East Fishkill. The surrounding road network allows for multiple opportunities for access to the Brookvale Subdivision. The existing road network allows for reasonable response time for emergency vehicles when needed. As stated previously, the surrounding road network offers numerous approaches to the site access drive. No sidewalks are proposed due to the limited amount of pedestrian traffic anticipated. Any pedestrian traffic will travel along the sides of the proposed road, and should have little to no impact on the vehicular traffic that the development generates. It is not anticipated that Brookvale residents will walk to nearby shopping or businesses due to the substantial distances from the development to shops, stores and businesses. The proposed Brookvale subdivision is estimated to generate 199 residents, 57 of which will be of school age (age 5-17 years of age)1. No wetlands will be disturbed at any point during or after construction of the proposed subdivision. A small portion (0.68 acres) of wetland adjacent area will be disturbed in order to access the proposed lots. The location of the proposed road keeps the amount of wetland adjacent area disturbance to a minimum. However, unlike the "As -of -Right" Subdivision, for the Average Density Subdivision, a series of conservation easements will be placed along the rear portions of the lots that contain wetlands. These conservation easements will be recorded in the deed for each individual property and will restrict future property owners from altering grades, constructing. or placing any structures in the easement, and prohibit mowing or fertilizing. Table 2.2-1 Proposed Site Data — Conventional "As -of -Right" Plan I Based on information from Rutgers University, Center for Urban Policy Research, "Residential Demographic Multipliers — Estimates of the Occupants of New Housing," June 2006. Morris Associates November 9, 2007 F:IdocumentslGeneral12f1()512051511EIYCURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSIONdoc Acreage Percent of Parcel Description Site Proposed Ownership Individual Property Residential Building Lots 83.89 93.72% Owners Interior Road Rights of Way 5.62 6.28% Town of Wappinger Total Impervious Area 7.58 8.47% Various Owners Total Site Acreage 89.51 nla I Based on information from Rutgers University, Center for Urban Policy Research, "Residential Demographic Multipliers — Estimates of the Occupants of New Housing," June 2006. Morris Associates November 9, 2007 F:IdocumentslGeneral12f1()512051511EIYCURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSIONdoc Brooki,ale Subdivision Draft En vironmental Impact SWemenl Page 39 Table 2.2-2 Proposed Site Data -- Average Density Plan Preservation of Historic Resources Cemete In the northern corner of the proposed subdivision, there is a small (1,800 S.F.) cemetery that dates back to 1757. In both the conventional and average density subdivision plans, this cemetery will remain preserved. In the proposed Average Density Subdivision, a Conservation Easement will be established within Lot 42 to preserve the cemetery. Access will be gained from the proposed road and chain link or other type of fencing system with a locked gate will enclose the cemetery. Housing Design The applicant is proposing to construct single-family detached dwelling units consistent with the higher -end housing stock in the surrounding neighborhoods. It is anticipated that these homes would retail in the high $400,000 to mid $500,000 range. Such housing is expected to be attractive to those wishing to reside in a neighborhood community and might include both young and older households as well as families with moderate income relative to the region's economics. Single-family homes will range in size from approximately 2,400 square feet to 3,000 square feet. These homes will include two -car garages and provision for additional parking in the driveway. It is anticipated that all of the homes will utilize electricity and gas for heating, cooking and cooling needs. The basic home is a multi -gabled, modern colonial style of architecture. The number of individual styles for homes has not yet been determined. Examples of typical home styles in included in Appendix 6.18. It should be noted that prospective buyers would have a number of elevations of each house to view when contemplating their home selection. Morris Associates November 9, 2007 E. Idocantents lGeneraA2005120515I WOCURRENT DEIS FOR BROOKYAGE DCT 20071 DEIS NOVEMBER 2007 SUBMISSION, doe Acreage Percent of Parcel Description +1- Site Proposed Ownership Residential Building Lots — 84.10 93.96% Individual Property (Conservation Easement) (40.17) (44.88%) Owners Interior Road Rights of Way 5.41 6.04% Town of Wappinger Total Impervious Areas 6.45 7.21% Various Owners Total Site Acreage 89.51 nla Preservation of Historic Resources Cemete In the northern corner of the proposed subdivision, there is a small (1,800 S.F.) cemetery that dates back to 1757. In both the conventional and average density subdivision plans, this cemetery will remain preserved. In the proposed Average Density Subdivision, a Conservation Easement will be established within Lot 42 to preserve the cemetery. Access will be gained from the proposed road and chain link or other type of fencing system with a locked gate will enclose the cemetery. Housing Design The applicant is proposing to construct single-family detached dwelling units consistent with the higher -end housing stock in the surrounding neighborhoods. It is anticipated that these homes would retail in the high $400,000 to mid $500,000 range. Such housing is expected to be attractive to those wishing to reside in a neighborhood community and might include both young and older households as well as families with moderate income relative to the region's economics. Single-family homes will range in size from approximately 2,400 square feet to 3,000 square feet. These homes will include two -car garages and provision for additional parking in the driveway. It is anticipated that all of the homes will utilize electricity and gas for heating, cooking and cooling needs. The basic home is a multi -gabled, modern colonial style of architecture. The number of individual styles for homes has not yet been determined. Examples of typical home styles in included in Appendix 6.18. It should be noted that prospective buyers would have a number of elevations of each house to view when contemplating their home selection. Morris Associates November 9, 2007 E. Idocantents lGeneraA2005120515I WOCURRENT DEIS FOR BROOKYAGE DCT 20071 DEIS NOVEMBER 2007 SUBMISSION, doe Broola,ale Subdivision Page 40 Draft Environmental Tmcact Statement Plantina, Buffering and Signs The applicant has a basic landscaping/planting plan that will be submitted to the Planning Board for review. It is anticipated that a variety of native trees will be planted in accordance with the requirements of the Town Code. It is projected that each lot will have two street trees along its frontage. Selected species may include Maple, Oak, Ash and Elm. Tree selection may be influenced by market conditions and what is available. Tree size will be approximately 2-112" — 3" dbh. The Brookvale Subdivision will be stop sign controlled with a sign placed on the proposed road before the intersection with Spook Hill Road. There will also be a "Dead End" sign placed within the subdivision, several hundred feet from the entrance. Utilities In order to adequately service the Brookvale Subdivision, the project will result in the creation of water, sewer and drainage utilities. Initially, potable water service was proposed to be provided to the subdivision from the existing municipal water supply system via connections to existing water mains at Ervin Drive and Fieldstone Boulevard, which would have created create a "looped" system, thereby benefiting that portion of the system for all nearby users. In response to comments from the Town Engineer, an additional connection to the existing water main in Spookhill Road will be made and will be' brought into the development along the proposed road and will connect to the water line at approximately STA 10+00, which will add to the loop and provide better water service for those utilizing the system in that area. Approximately 6,515 lineal feet of water main will be installed. Fire protection water will be supplied by a series of nine (9) fire hydrants located along the proposed road, at STA 14+00, STA 16+75, STA 21+25, STA 26+00, STA 32+00, STA 37+00, STA 40+75, STA 43+25 and STA 47.75. The proposed sewer system for the Brookvale Subdivision consists of approximately 5,000 linear feet of sewer main, which connects with existing sewer at the intersection of Spook Hill Road and the proposed road of this subdivision. In order for the wastewater flow to get to Spook Hill Road, a pump station will be necessary. The pump station will pump the wastewater flow approximately 700 feet, where the flow will travel by gravity along the remainder of the proposed road to the connection with the existing sewer at Spook Hill Road. The pump station will be located within a 30'x 30' easement on the front portion of Lot 25. A potential alternative sewer system for the Brookvale Subdivision consists of connecting to the existing sewer on Ervin Drive by gravity. Wastewater flow would then travel to the Kent Road pump station, which would be upgraded to accommodate the flow from the Brookvale Subdivision adequately. Morris Associates November 9, 2007 F: IdocumenrslGenerall20(1512051510S1CURRENT DEIS FOR BROOKVALE OCT 2007WE1S NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 41 Draft Environmentallmpact Statement In all instances, wastewater generated by the homes in the Brookvale Subdivision will be conveyed to the Tri -Municipal Sewage Treatment Plant and then discharged to the Hudson River. Note that the sanitary sewer collection system will transport only sanitary sewer flows, not stormwater. Drainage for the Brookvale Subdivision will be provided by approximately 4,475 linear feet of drainage pipe, connecting to a series of catch basins and stormwater management practices. Further information about the proposed drainage for the Brookvale Subdivision can be found in Section 3.1 of this document, and further information about the proposed water and sewer utilities can be found in Section 3.8 of this document. A full discussion of stormwater management can be found in Section 6.8 of Volume 2 of this DEIS. Post —development stormwater management will be accomplished using a variety of management techniques to capture, treat, hold and release runoff from the development. It is the intent of the applicant to minimize erosion and sediment problems during and upon completion of construction, reduce channel erosion, prevent overbank flooding, help control extreme floods, as well as meet the New York State Department of Environmental Conservation pollutant removal goals. Management techniques include: • Vegetated dry channels with check dams to provide water quality treatment • Natural sheet flow through and across undeveloped areas to exsting stream channel • Series of catch basins and related piping to direct captured runoff to management basins • Stormwater management basins • Micropool extended detention ponds ■ Dry ponds for additional flood protection • Drywells at selected individual residences • Stabilized construction entrance at site access and at each proposed lot driveway to minimize tracking of soil onto proposed road and/or Spook Hill Road The post -development drainage analysis, which was conducted only for those portions of the site in which changes will influence the hydrology and/or hydraulics of the resultant watersheds and drainage paths. The drainage evaluation indicates that the Morris Associates November 9, 2007 E• doctimentslGenera112011512051511EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft .Environmental Impact Slalemenl Page 42 watershed area to be considered totals approximately 92.26 acres, of which 89.51 acres lie within the property and 2.76 acres are offsite. Wetland and Floodplain Management The Average Density Subdivision has been designed to minimize disturbance to wetland areas (no wetland disturbance proposed), and to minimize any indirect impacts (buffer areas, etc.) associated with the development. A small percentage of the on-site wetlands could potentially receive sheet flow from the developed lands on the site. Some other potential runoffs could contain contaminants such as hydrocarbons (oil, gas, antifreeze, metal particulates, de-icing materials, fertilizers, pesticides, etc.). Through proposed mitigation measures such as stormwater management practices that will be discussed in further depth in Section 3.2, the effects of these runoffs will be minimized to the fullest extent. According to a U.S. Department of Housing and Urban Development Federal Insurance Administration study for the Town of Wappinger (Effective June 15, 1979), there is an "Approximate 100 Year Floodplain Boundaryalong the southeastern corner of the site (See Appendix 6.15). This area is entirely in what is now considered by the NYSDEC to be wetland (#WF -5). This entire area as well as all wetlands on this site will not be disturbed during construction of this proposed subdivision, thus no management of these floodplains will be necessary. Site Wetlands The identified wetlands can be characterized as both falling under the classification of Palustrine Forested Wetland (PF01 E). Plant community composition observed within the wetlands is more or less uniformly Palustrine Forested. Identified wetlands include: 1. Wetland A and Al - Palustrine Forested (PF01 E) — (13.71 acres) Jurisdiction: Town of Wappinger Wetlands, NWI Wetlands and NYSDEC Wetlands 2. Wetland B - Palustrine Forested (PF01 E) — (3.34 acres) Jurisdiction: Town of Wappinger Wetland and NWI Wetland Morris Associates November 9, 2007 E: IdocumentstGeneraA20(1512O5151 V EISICURRENT DEIS FOR BROOKVALE OCT 200710EIS NOVEMBER 2007 SUBMISSION -doe Brooks+ale Subd ivisiort Draf Environmentallmpad Statement 2.3 Construction Page 43 The proposed project is anticipated to take place in two phases over a period of approximately three to five years with each phase installing erosion control measures throughout the affected development areas. It is anticipated that construction will commence in 2008 and will be completed between 2011-2013. Access to the site for construction will be provided from Spook Hill Road. Commencement and completion dates are predicated on timely project approval. Please refer to the Average Density Subdivision Plan set located in Appendix 6.12 for the proposed Phasing Plan. Typical construction sequencing will be as follows: bulk clearing and grading, installation of water, sewer, electrical, and stormwater infrastructure, road construction, home construction and landscaping. Construction of the phases may overlap at certain times due to market demand, scheduling, and site infrastructure interdependence. It is understood that that the applicant will construct the infrastructure and the roadways in Phase 1 to facilitate the issuance of building permits. Upon satisfactory completion of the Phase 1 infrastructure, the Phase 2 infrastructure will commence and be completed. The applicant will construct and sell homes in Phase 1 as the infrastructure and roadways are being constructed in Phase 2. The applicant may also choose to sell and build homes in Phase 2 prior to the complete buildout of Phase 1. During construction, access to the site for construction vehicles will be available on Spook Hill Road, where the proposed road is to be constructed. Another potential construction vehicle access point is at the cul-de-sac of Fieldstone Boulevard, which will become an emergency access point once construction is completed. The following sections of Town Code regulate the hours of which certain construction can be carried out: According to Section 166-2 of the Town of Wappinger Code entitled "Noise Restricted": "No person shall cause or permit to be caused any noise which can be heard by a person with normal hearing beyond the boundaries of property owned, leased or otherwise controlled by him and caused by the following: B. Construction or demolition noises. Construction or demolition which emits such noises is prohibited between the hours of 7:00 pm and 7:00 am, except in the event of an emergency requiring immediate construction or demolition." According to Section 80-7 of the Town of Wappinger Code entitled "Hours for Blasting": Morris Associates November 9, 2007 E;}documenlsIGenerall200512051511EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSIONdoe Brookvale Subdivision page 44 Drafi EnWronmentallmpact Statement "it shall be unlawful to blast or carry on any blasting operation during other than daylight hours, or at any time on Sunday, except with the approval in writing of the Town Engineer." With the aforementioned Town regulations in place, construction may take place between the hours of 7:00 am and 7:00 pm, seven days a week. However, blasting (if necessary) will not occur at any time on a Sunday, unless the approval in writing is obtained from the Town Engineer. Blasting will take place only during daylight hours in accordance with the applicable town ordinance. Any and all blasting shall adhere to the blasting program outlined in Section 39.7 of the New York State Department of Labor code, entitled "Blasting Operations", which can also be found in Appendix 6.19. Performance guarantees in accordance with town standards will be posted for the infrastructure required in each phase of the project. These guarantees will secure the Applicant's obligations to provide the necessary roads, drainage and associated improvements supporting the homes. It is understood that the applicant will construct the infrastructure and roadways in the first phase (Phase 1) to facilitate the issuance of building permits. Upon completion of the Phase 1 infrastructure, Phase 2 infrastructure will commence and continue to completion. Homes will continue to be built and sold in Phase 1 as the roadways are being constructed in Phase 2. The applicant may choose to sell and build homes in Phase 2 prior to the complete buildout of Phase 1. Air Quality The DEIS for the prior approved 94 lot proposal (See Appendix 6.2) contained the following narrative relating to MicroclimatelAir Quality (in italics): `Prevailing winds generally approach this region from the west. Summer breezes tend to blow from the southwest, winter winds from the northwest. Inspection of the local topography indicates that prevailing winds, which approach the site during the summer, are minimally affected by the landform, providing a natural effect on the site. Careful orientation of buildings and landscape elements on this site would help to minimize the effects of the winter winds. The natural filtering effect of the trees and shrubs, which inhabit the site, is greatest during the summer months when leaves are out. The density of winter twigs, however, diffuses and softens harsh winds on lower elevations of the site. The absence of expanses of water or converging landforms reduces the incidence of wind concentrations and turbulence in the site vicinity. Air quality within the site is classified as Level 11 (6 NYCRR 272) as is most of western Dutchess County. This classification refers to the pollution potential of land uses, which are predominantly single and two family residences, small farms, and limited Morris Associates November 9, 2007 E: Wocumentsl Gene),ai120()512{)51511EIS1CURRENT DEIS FOR BROOKV.4LE OCT 20071DE1S NOVFMBER 2007 SUBMISSiON.doc Rrookvale Subdivision Page 45 Draft F'n1)lronmenta1Impact Stalement commercial services and industrial development. Exiting air quality is good due to the absence of major air pollution sources down wind of the site. There are no known permanent sources of noise pollution in the site area. Ambient noise levels were observed to be low in all areas of the site. During the on-site surveys in the fall of 1988, noise from vehicles traveling on nearby roads and from local residential activity could be heard from any location on the site." The preceding narrative from the 1989 DEIS relating to air quality and noise remains essentially valid. The difference today is that air quality in general in Dutchess County is worse than it was in 1989. Noise that will be heard from within the site will also be increased today over that which could be heard from within the site in 1989. The Brookvale project will not significantly increase the ambient noise levels over those that are typically experienced in any residential subdivision of this nature. There will be temporary construction noises from construction vehicles and equipment, hammering, air nailers, compressors, sprayers and other typical construction equipment. The project will not substantially impact the ambient air quality, other than temporary minor impacts that may occur during construction. Construction Equipment will be fitted with appropriate mufflers to reduce noise levels as much as is reasonable during operation. Construction activities will be undertaken only during daytime hours, and will comply with noise and air emissions standards in accordance with public regulations. The short-term construction impacts to air quality will be mitigated to comply with all applicable emissions rates allowed by New York State Law. Compliance with emissions standards can be assured with the use of properly maintained, modern equipment. Possible Blasting Mechanical equipment may be used for the site's rock removal. A portion of the proposed subdivision may require the use of blasting equipment for the eeplacement for the utility lines if mechanical means are insufficient. Please refer to Appendix Potential Blasting Areas Map. If blasting is required, all operations will adhere to New York State ordinances governing the use of explosives, particularly the blasting program outlined in Section 39.7 of the NYSDOL code, entitled "Blasting Operations" (see Appendix 6.19). Proper program guidelines will be established between the State, the Town, and the blasting contractor prior to undertaking this activity. The elements of such a program include, but are not limited to the following: • Precise engineering determination of the depth and location of on-site blasting. Morris Associates November 9, 2007 E:VdocumentslCeneraA2()(15i2051511E1S1 CURRENT DFIS FOR BROOKVALE OCT 20071DE1S NOVEMBER 2007 SUBMISSION.doc Brooki,ale Subdivision Oran Environmental Impact Statement 46 ■ Evaluation of the location of property lines and the structural nature of nearby buildings for determination of the maximum blast velocity for charges to be used. ■ Use of a seismograph to monitor each blast attempt and evaluate the blast velocity of the charges used. ■ Use of blast matting as may be necessary to minimize lifting of rock and debris during blasting. ■ All pertinent safety regulations and standards shall be applied as required for safety, security and other related details for any blasting deemed necessary. Applicable safety regulations are: • ACOE Safety Manual EM 385-1-1 • Code of Federal Regulations A.T.F. Title 27 • Institute of Makers of Explosives Safety Library Publications No. 22 Appendix • Section 39.7 of the NYSDOL code, "Blasting Operations" (see App 6.19) Storage of all explosive materials shall be located on the site at a location approved by the blasting engineer. Caps or other detonating devices will not be stored with Class A explosives. Design of the powder magazine shall be in accordance with the references above. The security for explosives and blasting materials stored on-site will be in accordance with engineer -approved requirements. Delivery and transportation of explosives from the powder magazines to the blast area will be by vehicles specifically designed for this use by the criteria outlined in the safety requirements. Only authorized persons will transport and handle the explosives as designated by the authority of those licensed for this purpose. At all times federal, state, and local ordinances will be followed concerning the transportation and storage of explosives. The designated storage site, explosive transporting vehicles, and areas where explosives are being used shall be clearly marked and shall display the required warning signs. A daily tally of all explosives delivered, used and stored shall be maintained. Prior to blasting, the necessary precautions for the protection of persons, adjoining property, and completed work shall be established, including: • Appropriate signs shall be erected in the area of blasting activities. Morris Associates November 9, 2007 E:IdocusnenislGenerall2005I205 i5I }EISICURRFNT DEIS FOR BROOKVAf E OCT 200710EIS NOVFA4BER 2007 SUBMISSION.doc Brookvaie Subdivision Page 47 Drafi Environinenlallmpaet Statement A storm alert monitoring device shall be used by the blasting Contractor to detect any electrical build-up in the atmosphere at the blast area while using electrical caps. • Special care shall be taken with detonating cords and connectors to protect from the impact of failing rocks or other impeding objects. • Vehicles equipped with radio transmitters and portable 2 -way radios will not be permitted within 250 feet of blasting operations. Erosion and Sediment Control Erosion control measures will play an important factor during construction of the subdivision. A breakdown by roads is as follows: Proposed "Road A" — Silt fence shall be erected at the toe of the new slope along the proposed road. A stone construction entrance shall be constructed at the intersection of this proposed road and Spook Hill Road. Erosion control measure designed to minimize soil loss, and sediment control measures devised to retain eroded soil and prevent it from reaching water bodies or adjoining properties, have been developed in accordance with the following documents: • New York State Guidelines for Urban Erosion and Sediment Control (April, 1997) ■ New York State General Permit for Stormwater Discharges, GP -02-01 (General Permit) Appendices D, E, and F (Stormwater Pollution Prevention Plan) ■ Reducin the Im acts of Stormwater Run-off from New Development, NYSDEC (April, 1992) The goals set forth in the erosion and sediment control plan are two -fold. The first objective is to control erosion by minimizing the opportunity for soil to be transported by wind, rainfall, or run-off. This goal will be met by disturbing the minimal amount of land possible at any one time. Additionally, areas undergoing clearing and/or grading and where work is delayed or completed and will not be re -disturbed for a period of 21 days or more will be stabilized with temporary or permanent vegetative cover within 14 days. Secondly, the erosion control measures have been incorporated into the plan to contain and trap the sediment as close to its place of origin, preventing it from reaching off-site watercourses or lands. These goals concur with the guidelines set forth by the NYSDEC `Reducing the Impact of Stormwater Runoff from New Development" manual. This objective will be met by installing the recommended sediment and erosion control Morris Associates November 9, 2007 E.ldocumenisIGenera b200512051511EMCURRENTDEIS FOR BROOKVALE OCT20070EIS NOVEMBER 2007 SUBMISSION -d -c Brookvale Subdh,[vion Draft Errvdrann2entallml>act Statemerll 48 structures prior to the initiation of construction and maintaining the protective measures during construction as indicated on the projects plans and details to ensure their stability and effectiveness. Types of Temporary Erosion Control Structures The erosion and sediment control measures shall be constructed prior to clearing and/or grading of any area of the proposed project. When construction activity temporarily ceases for more than an expected 21 days, areas to be'vegetated shall be stabilized with temporary seed and mulch within 14 days of the last disturbance activity. Additionally, all erosion and sediment control practices outlined on the erosion and sediment control and grading plans are to be installed prior to disturbance. All practices are to be designed and installed in accordance with the New York Standards and Specifications for Erosion and Sediment Control (2005). Silt Fencing Prior to the initiation of construction, silt fencing will be installed in areas deemed necessary by the contractor, to reduce run-off velocity and intercept sediment -laden run-off. Temporary Seeding Temporary seeding may be used in disturbed areas to minimize erosion and sediment loss. Any disturbed area that will not be re -disturbed for 21 days or more will be stabilized by the 14th day after the last disturbance. Stabilized Construction Entrance Prior to construction, stabilized construction entrances will be installed to reduce the tracking of sediment onto public roadways. A Typical Stabilized Construction Entrance Detail is located in Appendix 6.12. The stabilized construction entrance will use either 2° stone or reclaimed or recycled concrete equivalent over filter cloth, at depths and widths as listed in the referenced detail. All other notes contained in the detail pertaining to construction and maintenance of construction entrances for roads and driveways will be closely adhered to during the entire length of construction. Dust Control: Construction operations will be scheduled in order to minimize the amount of disturbed areas at any one time during the course of work. Existing vegetation will be preserved where possible and temporary soil stabilization practices such as mulching, seeding, and spraying of water will be utilized to control dust. Temporary Soil Stockpile Morris Associates November 9, 2007 E; IdocumentslGeneraA1005120515IlE1SICURRENT DFIS FOR BROOKVALE OCT 2007IDEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Envirorvmental Impact Slatevnent Page 49 Materials such as topsoil will be temporarily stockpiled as necessary on the site during the construction process. Stockpiles will be located in an area away from storm drainage and will be properly protected from erosion by a surrounding silt fence barrier. Types of Permanent Erosion Control Structures Establishment of Vegetation Disturbed areas to be vegetated will be seeded in accordancewith the contract documents. The type of seed, mulch, and maintenance measures as described in the contract documents will also be followed. Operation and Maintenance To confirm the stability and effectiveness of all protective measures and practices during and after construction, all erosion control measures employed will be inspected on a regular basis. During Construction Inspection and Maintenance, an Erosion and Sediment Control Maintenance Schedule will be provided on detail sheets. During construction, the contractor shall inspect and maintain the erosion control structures as stated on the aforementioned sheet and as shown on the following list: ■ The contractor shall inspect the erosion control structures weekly and after every storm event that exceeds 1/2" of rainfall. ■ The contractor shall pay close attention to each erosion control measure to ensure that each measure retains its structural integrity and is functioning properly. ■ Required maintenance shall be completed in a timely manner. ■ Accumulated sediment, debris, and litter shall be removed from the control structures as required in order to maintain the available stormwater management capacity and to preserve satisfactory performance of each structure. ■ Silt fencing shall be replaced when it can no longer retain its structural integrity. ■ Materials that are not trapped by the stabilized construction entrance and are deposited onto public roads shall be removed so that they do not enter off-site catch basins. Morris associates November 9, 2007 E:WocumentslGene-112005120515 I 1EMCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivls inn Drgfi Environmental Impact Statement Page 50 • On-site dust control shall be employed in accordance with standard methods. Accumulated sediments removed from the control measures will be placed in such a manner that they will not erode from the site. Specifically, the sediment removed from the catch basins will be exported from the site, stockpiled for later use, or used immediately for general nonstructural fill. Should stockpiling be necessary, material will be placed in flat topped, conical piles surrounded by silt fence. Further information about Erosion and Sediment Control can be found in Section 3.1 of this document. Morris Associates November 9, 2007 E.•klocumentslGenera112005121151511EMCURRENT DEIS FOR BROOKVRLE OCT20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookrale Subdivision Page 51 Draft Environmenlal1"Waci Slalemenl 3.0 Impact Analysis 3.1 Surface Water According to the NYS SPDES General Permit, a SWPPP must be developed for the Brookvale Subdivision. This SWPPP has been developed in order to meet the requirements of NY SPDES General Permit #GP -02-01. Existing Conditions The following is taken from the SWPPP report that can be found in its entirety in Appendix 6.8. "The site consists of 89.5 acres, most of which drains to three (3) wetlands contained on the property identified as Wetland A-1, Wetland A-2, and Wetland B. Wetlands A-1 and A-2 drain directly to a small, unnamed, 1st order stream channel which exits the northwest corner of the property. Wetland B drains offsite along the northern property line before collecting in a small drainage channel, flowing behind several existing residences, and crossing Central Avenue. The New York State Department of Environmental Conservation regulates Wetiand A-1 (12.620 acres) and Wetland A-2 (0.286 acres) as part of NYSDEC WF -5, as well the 100ft adjacent area surrounding each wetland. Federally regulated wetlands include Wetland A-1, Wetland A-2, and Wetland B (3.035 acres). The Town of Wappinger regulates all three wetlands, as well the 100ft adjacent area surrounding each wetland, under the Town of Wappinger Local Wetland Ordinance. Based on the Town Ordinance, Wetland A-1 encompasses an additional 0.634 acres (total 13.254 acres) over that regulated by NYS DEC. Wetland B encompasses an additional 0.121 acres (total 3.156 acres) over what is federally regulated. The wetlands are bounded by 100 -foot wide buffer areas, which encompass an additional 18.5 acres. The site is completely forested and contains no impervious surfaces. The majority of the site to be developed contains slopes ranging from 1-10%. Morris Associates November 9, 2007 E: Idocumen(sl General)200512051511EISICURRENT DEIS FOR BROOKVAI.E OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookrale Subdivision DraJ1 Envlronmenlal hnpact Slatement Page 52 PRE -DEVELOPMENT DRAINAGE ANALYSIS For the purposes of this analysis,. Morris Associates limited the hydrological model to those areas impacted by to the proposed Brookvale development. Based on this evaluation, the contributing watershed consists of approximately 92.26 acres, of which 89.51 acres is located within the property boundary of the site and 2.76 acres from off-site areas. A pre -development drainage analysis was conducted for the site. The site was determined to be comprised of five (5) drainage areas DA -1, DA -2, DA -3, DA -4, and DA -5 with corresponding design points (discharge points) DP -1, DP -2, DP -3, DP -4, and DP -5, located at low points just outside the property boundary. These design points may be a point where concentrated runoff in a stream or swale exits the property or just an indication of the general direction of overland flow across the property line. The five existing design points are described as follows: Design Point 1 (DP -1 Stormwater runoff from Drainage Area 1 flows through Wetland A-1 before collecting in and combining with a small, unnamed, 1st order stream channel. Flow is transported off the site at Design Point 1. Flow continues through a private residential property and returns on the site as part of Drainage Area 2. The 33.2 acre drainage area contains B, C, and D -type soils, and is wooded. Design Point 2 DP -2 Stormwater runoff from Drainage Area 2 flows through Wetland A-2 before collecting in and combining with a small, unnamed, 1st order stream channel which exits the northwest corner of the property. Flow from Drainage Area 2 combines with flow from Drainage Area 1 and is transported off the site at Design Point 2 by the stream channel. The 5.4 acre drainage area contains B and C-type soils, and is predominantly wooded except for a portion of residential parcel existing off-site. Design Point 3 (DP- Stormwater runoff from Drainage Area 3 flows through Wetland B before exiting the site at Design Point 3 as shallow concentrated flow. Wetland B drains offsite along the northern property line before collecting in a small drainage channel, flowing behind several existing residences, and crossing Central Avenue. The 27 acre drainage area contains B and C- type soils, and is predominantly wooded except for a portion of residential parcel existing off-site. Morris Associates November 9, 2007 E:ldocumentslGeneral1200512051511EISICURRE,N7' DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISNON.doc Brooknale Subdivision Draft Environmental hnpact.italemcnt Design Point 4 (DPA Stormwater runoff from Drainage Area 4 collects as sheet flow and exits the site as Design Point 4, along the northern side of the property. The 15.6 acre drainage area contains B and C-type soils, and is wooded. Desi n Point 5 DP -5 Stormwater runoff from Drainage Area 5 collects as sheet flow and exits the site as Design Point 5, along the eastern side of the property. The 11.3 acre drainage area contains B and C-type soils, and is wooded." A summary of the existing condition hydrologic analysis can be found below in Table 3.1-1, and a summary of the peak flow rate values can be found in Table 3.1-2 below. DFalf1� a g Ar ea RGN Q'�0.xear �2S-year Tchrs } Ari r (acres) ; DA -1 33.18 72 1.034 DA -2 5.38 59 0.646 DA -3 27.05 65 33.5 46.1 0.512 DA -4 15.64 69 3.6 1 5.7 0.487 DA -5 11.28 68 27.8 40.6 0.364 Table 3.1-1 Existing Condition Hydrologic Analysis IJr+$Illa�e '�+[� yearF�y �2..yea` Q'�0.xear �2S-year 5700 -year DA -1 9.4 16.2 33.5 46.1 72.7 DA -2 0.4 1.1 3.6 1 5.7 10.4 DA -3 5.3 11.2 27.8 40.6 68.6 DA -4 4.9 9.1 20.0 28.1 45.5 DA -5 3.5 6.9 1 15.6 1 22.2 1 36.3 Table 3.1-2 Existing Condition FeaK HOW Kates 53 Morris Associates November 9, 2007 E:IdocumemslGeneraA2005I205i5I0,5 CURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSIONdoc Brookvale Subdivision Draft EnvironmeMal Impact Slaternenl 54 Proposed Conditions The following is taken from the SWPPP report that can be found in its entirety in Appendix 6.8. "Development of the site will create additional impervious areas including the construction of approximately 4,625 linear feet of new road. The area of impervious surfaces, i.e, roads, driveways, sidewalks and rooftops totals approximately 8.41 acres or 9.4% of the total project area. The area converted into lawn includes approximately 31.3 acres or 35.0% of the total project area. POST -DEVELOPMENT DRAINAGE ANALYSIS The post -development drainage analysis was conducted for only the portions of the site in which changes will influence the hydrology and/or hydraulics of the subsequent watersheds and drainage paths. Based on this evaluation, the contributing watershed consists of approximately 92.26 acres of which 89.51 acres is located within the property boundary of the site and 2.76 acres from off-site areas.. The site was determined to be comprised of ten (10) drainage areas DA - la, DA -1b, DA -1c, DA -2, DA -3a, DA -3b, DA -4, DA -5a, DA -5b, and DA -5c which correspond to five design points DP -1, DP -2, DP -3, DP -4, and DP - 5, located at low points just outside the property boundary. These discharge points (design points) may be a point where concentrated runoff in a stream or swale exits the property or just an indication of the general direction of overland flow across the property line. Proposed design points are located on the included proposed conditions site plan in Appendix B. The five proposed design points are described as follows: Design Point 1 DP -1 Stormwater runoff from two (2) drainage areas on the site drain to DP -1. • Stormwater runoff from Drainage Area lb is collected and transported to a small, unnamed, 1st order stream channel in Drainage Area 1c using vegetated dry channels with check dams to provide water quality treatment. The 1.81 acre drainage area contains B and C-type soils, and is comprised of paved roads and lawn. • Stormwater runoff from Drainage Area 1c, remains unaffected by the proposed project. The runoff continues to follow its natural course from Wetland A-1 toward the west boundary of the site where flow combines with Drainage Area 1b and is transported off the site at DP -1 by Morris Associates November 9, 2007 E; IdocumenlslGenerol1200512051511EIYCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMRBR 2007 SUBMISSION -doe Brookvale Subdivision Draft EnvieonmentalImpart Statement a small unnamed channel. Flow continues through a private residential property and returns on the site as part of Drainage Area 2. The 20.97 acre drainage area contains C, B, and D -type soils, and is comprised of woods. Design Point 2 (DP -2) Stormwater runoff from one drainage area combines with runoff from DP -1 and drains to DP -2. • Stormwater runoff from Drainage Area la is collected and transported to a stormwater management basin. Outflow from the basin is piped to an unnamed stream channel before exiting the site at DP -2. The stormwater management basin located in Drainage Area la is designed as a micropool extended detention pond (P-1) and is supplemented with a dry pond for additional flood protection. This stormwater practice combination provides water quality treatment for Drainage Area la, as well as channel protection, overbank flood and extreme storm protection at DP -2. The 17.75 acre drainage area contains C, B, and D -type soils, and is comprised of lawn, homes, driveways, roads, and woods. • Stormwater runoff from Drainage Area 2 remains relatively unaffected by the proposed project, except for the creation of a dry detention pond to facilitate additional storage for Drainage Area 2. Stormwater runoff is collected in a small, unnamed, 1st order stream channel which flows through Wetland A-2. Flow from Drainage Area 2 combines with flow from Drainage Area 1 and is transported off the site at Design Point 2 by the stream channel. The 6.07 acre drainage area contains B and C-type soils, and is predominantly wooded except for a residential parcel existing off-site. Design Point 3_{DP-31 Stormwater runoff from two (2) drainage areas on the site drain to DP -3. • Stormwater runoff from Drainage Area 3a is collected and transported to a stormwater management basin. Outflow from the basin is piped to existing Wetland B in Drainage Area 3b. The stormwater management basin located in Drainage Area 3a is designed as a micropool extended detention pond (P-1). This stormwater practice provides water quality treatment for Drainage Area 3a, as well as channel protection, overbank flood and extreme storm protection. The 17.06 acre drainage area contains C-type soils, and is comprised of lawn, homes, driveways, roads, and woods. Page 55 Morris Associates November 9, 2007 E; Idocumentsl General12005i20515 P EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Drag Environmental Imnact Statement Page 56 • Stormwater runoff from Drainage Area 3b remains relatively unaffected by the proposed project. Water quality volume from two proposed homes will be treated using dry wells installed at each individual residence. The runoff continues to follow its natural course from Wetland B toward the northern boundary of the site where flow is transported off the site at DP -3. The 16.16 acre drainage area contains B and C-type soils, contains two homes is primarily wooded. Design Point 4 (DP -4) • Stormwater runoff from DA -4 remains relatively unaffected by the proposed project. The runoff continues to follow its natural course from a highpoints on the site toward a low area along the northern boundary of the site at DP -4. The 2.91 acre drainage area contains C and B -type soils, and is comprised of woods and lawn. Design Point 5 (DP -5) Stormwater runoff from three (3) drainage areas on the site drains to DP - 5. • Stormwater runoff from Drainage Area 5a is treated for water quality using individual dry wells at each proposed residence before flowing offsite at DP -5. The 1.48 acre drainage area contains C-type soils, and is comprised of lawn, homes, driveways, and woods. • Stormwater runoff from Drainage Area 5b is treated for water quality using dry swale with check dams before flowing offsite at DP -5. The 3,21 acre drainage area contains C and B -type soils, and is comprised of lawn, homes, driveways, and woods. • Stormwater runoff from Drainage Area 5c is treated for water quality using dry wells installed on each individual residence. The runoff continues to follow its natural course from a highpoints on the site toward a low area along the southeastern boundary of the site at DP -5. The 4.86 acre drainage area contains C and B -type soils, contains three homes and is primarily wooded. Morris Associates November 9, 2007 E:ldocumenlsIGenerab2OO512051511EISICURRENT DEIS FOR BROOK VALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION,doc Brook v016 Subdivision Draft Environmental Impact Statement A summary of the developed condition hydrologic analysis can be found I below in Table 3.1-3 and 3.1-4. uT rea acres) year; of DA -1a 17.75 78 0.422 DA -1 b 1.81 81 0.332 DA -1c 20.97 73 0.955 DA -2 6.07 59 0.592 DA -3a 17.06 78 0.470 DA -3b 16.16 64 0.632 DA -4 2.91 67 0.468 DA -5a 1.48 75 0.493 DA -5b 3.21 68 0.602 DA -5c 4.86 70 0.435 Table 3.1-3 Proposed Conditions Hydrologic Analysis A summary of the developed runoff conditions without any stormwater management practices (SMP's) can be found below in Table 3.1-4. Drainage A�a,f Q1�yearQ-2 year; of (1U yeas Q25 Y Ob J,Year (R 104 DA -1a 12.0 18.7 34.5 45.5 68.1 DA -1c 1.6 2.4 4.3 5.6 8.1 DA -1c 6.5 11.1 22.5 30.7 47.9 DA -2 0.4 1.3 4.1. 6.4 11.7 DA -3a 11.0 17.1 31,5 41,7 62.4 DA -3b 2.5 5.6 14.2 21.0 36.0 DA -4 0.8 1.5 3.4 4.9 8.2 DA -5a 0.8 1.2 2.4 3.2 5.0 DA -5b 0.8 1.6 3.6 5.0 8.3 DA -5c 1.8 3.2 6.8 9.6 15.3 Page 57 Table 3.1-4 Proposed Conditions Unmitigated- Peak Flow Rates Morris Associates November 9, 2007 F ldocumentslGenerall200512(1515 i 1EISICURRENT DEIS FOR BROOKVAGE OCT 20071DEIS NOVEM8ER 2007 SUBMISSIONdoc Broobale Subdivision Page 58 Draft Environmental Impact Statement Based on comparison between the existing and unmitigated proposed conditions (without stormwater management) the peak flow rates will increase at Design Point 2 and Design Point 3 at a rate greater than that of the existing conditions for the 10 and 100 -year 24 hour storm events, Table 3.1-5. Table 3.1-5 Comparison or peaKFtow raLc:D,, GAIZIL111y 47111 1•�N��-�-----••--_.___s - Unmitigated In accordance with NYS regulations, the increase in peak flow at DP -2 and DP -3 must be mitigated such that the proposed peak runoff rates are no greater than that of the existing condition rates for the 10 -year and 100 - year 24-hour storm events. In addition, the stormwater facilities shall be designed to allow for 24-hour extended detention of the 1 -year 24-hour storm event (12 -hour extended detention when discharging to trout streams). The peak flows in areas contributing to DP -1, DP -4, and DP -5 will not require mitigation. Refer to Appendix 6.8of this DEIS for required storage volumes and calculations. Drainage networks placed along each proposed roadway will collect stormwater runoff and convey it to the stormwater management practices. The practices will be constructed at the site, one to serve Drainage Area la (Stormwater Management Basin #1) and the other to serve Drainage Area 3a (Stormwater Management Basin #2). Based on the current site conditions, stormwater ponds were chosen to mitigate the proposed development. Two (2) Micropool Extended Detention Ponds are proposed within the site. The stormwater management basins will outlet to the adjacent wetlands using a concrete box multi -outlet structure and discharge pipe. Morris Associales November 9, 2007 E•IdocumentslGenera112005I2051511EISICURRENT DEIS FOR BROOKVAGE OCT 200ADEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Sub&vision Draft Environmental GnRact Solement Additionally these basins will contain emergency spillways to convey extreme flows from unusual runoff events. An access drive and/or access point will be provided for maintenance issues at each basin, beginning at the proposed road system. In developed areas where stormwater runoff cannot be conveyed to a stormwater management basin, alternate methods of treatment have been selected. Dry swales will be incorporated along the entrance road within Drainage Area lb within the grading plan to providing both water quality and quantity treatment. In addition, the swales will incorporate check dams to provide temporary storage, promote infiltration, and dissipate velocities. Drywells will be incorporated at residences in Drainage Area 5 to provide both water quality and quantity treatment. Hydraulic routing was performed for each of the proposed basins to ensure the above mentioned criteria will be met. It should be noted that drywells and dry swales were not included within the hydraulic routing, but will have been designed to provide adequate water quality and quantity treatment. A comparison of the existing and mitigated proposed hydrologic conditions is shown below in Table 3.1-6. 59 Table 3.1-6 comparison or pear- 11UVW �.�..��•••y �•,-..._r---- - - - Mitigated The selected practices meet the water quality and quantity requirements set forth in the New York State Stormwater Management Design Manual. The use of sediment forebays will be provided at all major inflow points. Furthermore, the use of vegetated dry swales and drywells will be Morris Associates November 9, 2007 E; IdocumewslGeneral120051205151WMCURRENT DEIS FOR BROOKVALE OCT 2007IDEIS NOVEMBER 2007 SUBMISSION,doe is Brookvale Subdivision Draft Environmental Impact Statemenl bo incorporated, where applicable, to provide conveyance of runoff as well as to provide supplemental water quality treatment of stormwater. In addition to the permanent stormwater management practices, temporary erosion and sediment control practices are to be installed during the course of construction. These practices are incorporated to minimize and reduce the soil erosion and sediment impacts from construction activity involving soil disturbance. The overall course of construction will be phased to limit the overall disturbance to no more than five (5) acres at a time in accordance with the NYS Phase 11 requirements. WATER QUANTITY AND QUALITY CONTROLS Water quality treatment will be designed to capture and treat 90% of the annual stormwater runoff volume or the full water quality volume (WQV). Unified Stormwater Sizing Criteria is used to determine the required water quality volume. The referenced formula below is used to determine this volume. WQ P*]Zv *A 12 Where: VNQv - Water Quality Volume in acre-feet P _ 90% Rainfall Event Number in inches Rv = 0.05 + 0.009(1), minimum Rv of 0.2 A = Site Area in acres I — Impervious Cover as a Percentage Morris Associates November 9, 2007 E: idocumenislGeneraU 005 1205151 1EISICURRENT DEIS FOR BROOKVALE OCT 200710EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Page 61 Draft Environmerrta! Cn�pact Stalemenl A summary of the required water quality volumes is shown below in Table 3.1-7, Tl rper�ic�p� ferceC� Required Rd equireWQv Qr_ovided r mage e Ares Area Impervious W�Qv (ac WQv (ft3) _ DA -la 17.75 3.58 20.07 0.37 5 16,348 18,448 DA -1b 1.81 0.47 25.90 0.047 2,050 2,254 DA -1c 20.96 0.00 0.00 NIA NIA NIA DA -2 6.07 0.00 0.00 N1A NIA NIA DA -3a 17.06 3.67 21.52 0.381 16,698 18,793 DA -3b 16.15 0.21 1.28 0.091 3,968 > 4,000 DA -4 2.91 0.00 0,00 NIA NIA NIA DA -5a 1.47 0.18 12.22 0.022 942 > 950 DA -5b 3.21 0.23 7.25 0.034 1,479 1,650 DA -5c 4.86 0.09 1.82 0.030 1,288 >1,300 Table 3.1-7 Required Water Quality Volume STREAM CHANNEL PROTECTION Unified Stormwater Sizing Criteria is used to determine the required Stream Channel Protection volume (CPV). In accordance with the New York State Stormwater Management Design Manual, stream channel protection is accomplished by providing 24-hour extended detention of the one-year, 24-hour storm event. The requirement does not apply for discharges directly discharging to streams determined to be fourth order or greater using the Strahler-Horton method, or when recharge of the entire volume is achieved at a site. The CPV detention time for the one-year storm is defined as the time difference between the center of mass of the inflow hydrograph (entering the SMP) and the center of mass of the outflow hydrograph (leaving the SMP). A modified version of the United States Department of Agriculture Technical Release 55 (TR -55) "Short -Cut Method" was used to relate the required storage volume to the required reduction in the peak flow and storm inflow volume. This method is primarily used to estimate a storage volume given a storm run-off volume and resulting peak discharge, and has been modified to incorporate the small flows necessary to provide stream channel protection. Morris Associates November 9, 2007 E:ldocumenlslGeneralt2005120515I1EIMCURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brook,ale Subdivision Drafi Environmental Impact Statement The Channel Protection Volume (CPV) may be waived if the entire volume is recharged at the site. It may also be waived if the site discharges directly to tidal waters or fourth order or larger streams. A summary of the required Stream Channel Protection (CPV) volumes are shown below in Table 3.1-8. i qutr ", l4rea Reuicl'Pro►i�c�ed Uratrwage►rea CPv (ac CPQ (f3). CPu3 (a� 4 DA-1 a 17.75 0.805 35,051 35,616 DA-1 b 1.81 NIA NIA NIA DA-1c 20.97 NIA NIA NIA DA-2 6.07 NIA NIA NIA DA-3a 17.06 0.773 33,661 34,605 DA-3b 16.16 NIA NIA NIA DA-4 2.91 NIA NIA NIA DA-5a 1.48 NIA NIA NIA DA-5b 3.21 NIA NIA NIA DA-5c 4.86 NIA NIA NIA Table 3.1-8 Required Stream Channel Protection OVERBANK FLOOD PROTECTION Unified Stormwater Sizing Criteria is used to determine the overbank flood control volume in order to prevent an increase in the frequency and magnitude of out -of -bank flooding generated by urban development (Le., flow events that exceed the bankfull capacity of the channel, and therefore must spillover into the floodplain). The requirement does not apply for discharges directly to streams determined to be fourth order or greater using the Strahler-Horton method, or when a downstream analysis reveals that peak flows increase by less then 5% of the pre -developed condition and that no downstream structures or buildings are impacted. Overbank Flood Control requires storage volume to attenuate the post development 10 -year, 24-hour peak discharge rate (Qp) to predevelopment rates. The TR -55 °Short -Cut Method" is used to relate the required storage .volume to the required reduction in peak flow and storm inflow volume. This method is primarily used to estimate a storage volume given a storm run-off volume and resulting peak discharge. 62 Morris Associates November 9, 2007 E; IdocumentslGeneraA2005i20515I1EMCURRENT DEIS FOR BROOKVALE OCT 200WEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impact Statement The Overbank Flood Control requirement (Qp) may be waived if the site discharges directly to tidal waters or fourth order or larger streams. Additionally, the Overbank Flood Control requirement (Qp) may be waived if a downstream analysis reveals that channel protection is not required. A summary of the required Overbank Flood Control volumes are shown below in Table 3.1-9. Dstgn AriaP1n PQIn!t (ac GF'1d DP -1 40.53 N/A NIA DP -2 46.60 1.860 81,000 DP -3 33.21 1.376 59,930 DP -4 2.91 NIA NIA DP -5 9.55 NIA NIA Table 3.1-9 Required Overbank Flood Protection EXTREME FLOOD PROTECTION Unified Stormwater Sizing Criteria is used to determine the Extreme Flood Control (100 Year Control) volume in order to prevent the increased risk of flood damage from large storm events, maintain the boundaries of the predevelopment 100 -year floodplain, and protect the physical integrity of stormwater management practices. The requirement does not apply for discharges directly to streams determined to be fourth order or greater using the Strahler-Horton method, or when a downstream analysis reveals that peak flows increase by less then 5% of the pre -developed condition and that no downstream structures or buildings are impacted. Extreme Flood Control requires storage volume to attenuate the post development 100 -year, 24-hour peak discharge rate (Of) to predevelopment rates. The TR -55 "Short -Cut Method" is used to relate the required storage volume to the required reduction in peak flow and storm inflow volume. This method is primarily used to estimate a storage volume given a storm run-off volume and resulting peak discharge. The Extreme Flood Control criteria (Qf), or 100 -year storm control, may be waived if the site discharged directly to a fourth order or larger stream. If the development is prohibited within the ultimate 100 -year floodplain the Extreme Flood Control criteria (Of) may be waived. Finally, if a downstream analysis reveals that 100 -year storm control is not required the criteria may be waived. 63 Morris Associates November 9, 2007 E: IdoeumenislGenerah2r10512051511EISICURRENT DEIS FOR BROOKYALE OCT 2007WEIS NOVEMBER 2007 SUBMISSION.doe Brookvale Subdivision Drafl Environmental fmpacl Slalement Page, 64 Table 3.1-10 Required Extreme Flood Protection Stormwater Management Practices The New York State Stormwater Management Design Manual identifies a number of practices that are designed in order to mitigate the water quality and quantity issues with development. The approved practices include five groups of stormwater management practices. These groups include constructed ponds, wetlands, infiltrators, filtering practices, and open channels. Each of the subsequent groups contains a number of practices that may be designed and employed on a site to achieve the SPDES r Phase II goals. E The following list identifies each of the groups previously mentioned along with their corresponding practices and a description of each of the practices. PONDS Micropool Extended Detention Pond (P-1): Pond that treats the majority of the water quality volume through extended detention, and incorporates a micropool at the outlet of the pond to prevent sediment re -suspension. Wet Pond (P-2): Pond that provides storage for the entire water quality volume in the permanent pool. Wet Extended Detention Pond (P-3): Pond that treats a portion of the water quality volume by detaining storm flows above a permanent pool for a specified minimum detention time. Multiple Pond System (P-4): A group of ponds that collectively treat the water quality volume. Morris Associales November 9, 2007 E; ldocumenIAGeneraIWOJ12051511EMCURRENT DEIS FOR BROOKVAGE OCT 2007TEIS NOVEMBER 2007 SUBMISSION.doc Requiredr Regeared ; Des�gnr` Ares QP100 (ac QP10� F Point (acres] DP -1 40.53 NIA NIA DP -2 46.60 4.549 198,160 DP -3 33.21 2.551 111,104 DP -4 2.91 NIA NIA DP -5 9.55 NIA NIA Table 3.1-10 Required Extreme Flood Protection Stormwater Management Practices The New York State Stormwater Management Design Manual identifies a number of practices that are designed in order to mitigate the water quality and quantity issues with development. The approved practices include five groups of stormwater management practices. These groups include constructed ponds, wetlands, infiltrators, filtering practices, and open channels. Each of the subsequent groups contains a number of practices that may be designed and employed on a site to achieve the SPDES r Phase II goals. E The following list identifies each of the groups previously mentioned along with their corresponding practices and a description of each of the practices. PONDS Micropool Extended Detention Pond (P-1): Pond that treats the majority of the water quality volume through extended detention, and incorporates a micropool at the outlet of the pond to prevent sediment re -suspension. Wet Pond (P-2): Pond that provides storage for the entire water quality volume in the permanent pool. Wet Extended Detention Pond (P-3): Pond that treats a portion of the water quality volume by detaining storm flows above a permanent pool for a specified minimum detention time. Multiple Pond System (P-4): A group of ponds that collectively treat the water quality volume. Morris Associales November 9, 2007 E; ldocumenIAGeneraIWOJ12051511EMCURRENT DEIS FOR BROOKVAGE OCT 2007TEIS NOVEMBER 2007 SUBMISSION.doc Brook -vale Subdivision Draft EnWronmeniallmpactStatenwnt Page GS Pocket Pond (P-5): A stormwater wetland design adapted for the treatment of runoff from small drainage areas that has little or no baseflow available to maintain water elevations and relies on groundwater to maintain a permanent pool. WETLANDS Shallow Wetland (W-1): A wetland that provides water quality treatment entirely in a wet shallow marsh. Extended Detention Wetiand (W-2): A wetland system that provides a portion of the water quality volume in the permanent pool of a wet pond that precedes the marsh for a specified minimum detention time. Pond/Wetland System (W-3): A wetland system that provides a portion of the water quality volume in the permanent pool of a wet pond that preceded the marsh for a specified minimum detention time. Pocket Wetland (W-4): A shallow wetland design adapted for the treatment of runoff from small drainage areas that has variable water levels and relies on groundwater for its permanent pool. INFILTRATION Infiltration Trench (1-1): An infiltration practice that stores the water quality volume in the void spaces of a gravel trench before it is infiltrated into the ground. Infiltration Basin (1-2): An infiltration practice that stores the water quality volume in a shallow depression, before it is infiltrated into the ground. Dry Well (1--3): An infiltration practice similar in design to the infiltration trench and best suited for treatment of rooftop runoff. FILTERING PRACTICES Surface Sand Filter (F-1): A filtering practice that treats stormwater by settling out larger particles in a sediment chamber, and then filtering stormwater through a sand matrix. Underground Sand Filter (F-2): A filtering practice that treats stormwater as it flows through an underground settling and filtering chambers. Perimeter Sand Filter (F-3): A filter that incorporates a sediment chamber and filter bed as parallel vaults to an adjacent parking lot. Morris Associates November 9, 2007 E: IdocumenisiGenerat 11005 42 05 15 1 EMCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision DraT F,nvironmentalImpact Statement Pale 66 Organic Filter (F-4): A filtering practice that uses an organic medium such as compost in the filter, in place of sand. Bioretention (F-5): A shallow depression that treats stormwater as it flows through a soil matrix, and is returned to the storm drain system. OPEN CHANNELS Dry Swale (0-1): An open drainage channel or depression explicitly designed to detain and promote the filtration of stormwater runoff into the soil media. Wet Swale (0-2): An open drainage channel or depression designed to retain water or intercept groundwater for water quality treatment. The table on the following page identifies each of the treatment systems used in each of the drainage areas at the site. For specific design guidelines of each stormwater management practice refer to Chapters 5 thru 7 of the New York State Stormwater Management Design Manual (2004). Morris Associates November 9, 2007 E.• idocumentslGeneral120(1512115151 YEISICURRF.NT DEIS FOR BROOKVAGE OCT 20071 DEIS NOVEMBER 2007 SUBMISSION. doc Brookvale SuWivision Draft Environmental Impact Statement Pave 67 s 17A 1a z�!.u�a dA DA DA DA D� pA QA DQ► DA .. X X t -1 W-4 tl=1 )i X X X Fgr F-4 1... .._. X X int hey X Table 3.1-11 Stormwater Practices Used Three stormwater management basins will be constructed at the site, two basins to serve DA -1a and the other to serve DA -3a. The stormwater management basin serving DA -1a is designed as a Micropool Extended Detention Pond (P-1) providing the required water quality volume, channel protection volume, as well as additional detention to mitigate the quantity increase at the Design Point 2. The Micropool Extended Detention Pond Both will outlet to a Dry Pond using a concrete box outlet structure and discharge pipe. The Dry Pond will provide additional storage to mitigate the quantity increase from extreme flood events. The Dry Pond will outlet to the adjacent unnamed tributary at Design Point 2 using a discharge pipe. Additionally both of these ponds will contain emergency spillways to convey extreme flows from unusual runoff events. Morris Associates November 9, 2007 E: IdocumentsI CCnerah2005Q05151 WISI CURRENT DEIS FOR HROOKVALE OCT 20071DEIS NOVEMBER 2007 SURMISSION.doc Brookvale Subdivision Draft EnvironmenlalImpact Statement The stormwater management basin Da -3a is designed as a Micropool Extended Detention Pond (P-1) providing the required water quality volume, channel protection volume, as well as additional detention to mitigate the quantity increase at the Design Point 3. The ponds will outlet to the adjacent wetlands in DA -315 using a concrete box outlet structure and discharge pipe. Additionally the ponds will contain an emergency spillway to convey extreme flows from unusual runoff events. An analysis was not performed to determine the additional storage volume provided by the existing wetlands on site. LANDSCAPING GUIDANCE In addition to the hydraulic properties of the stormwater management practices, a planting schedule has been prepared for each practice for the treatment and pollutant removal properties as well as providing additional wildlife values. The plantings have been selected based on Appendix H of the "New York State Stormwater Management Design Manual", 2004 and the "Design of Stormwater Wetland Systems", October 1992. The plant selections were based on their performance, survival rate, and aesthetic and wildlife values and have been situated within the various hydrologic zones within the practices. Refer to the Post Developed Drainage Area Plan for the hydrologic zones and the corresponding planting list. STORMWATER MANAGEMENT PRACTICE MAINTENANCE The maintenance of all stormwater management practices will be the responsibility of the contractor during the course of construction and will be the Town of Wappinger's responsibility after construction is complete. Maintenance of the various components of the system is described below. The proposed stormwater management practices on site will be inspected on a monthly basis and after all major storm events (e.g., after each event where 3 inches of rainfall is exceeded in a 24 hour period). During the inspection, the New York State DEC Maintenance Inspection Checklist should be utilized to properly maintain the practices. In addition, the following items should be checked and repaired as needed: • The area between the normal water surface and upland discharge points should be checked for erosion, and all eroded areas should be stabilized with topsoil, seed and mulch immediately. Morris Associates November 9, 2007 E:IdocumentslGeneraA20051205151VYCURRENT DEIS FOR BROOKVALF, OCT20071DEISNOVEMBER 2007SUBMISSIONdoc 68 Brookvale Subdivision Draft Environmental Impact Statement Page G9 • All culvert outlets and inlets directing stormwater either into or out of the practices shall be checked for clogging and accumulation of sediment or cleaned as needed. • The areas immediately surrounding the culvert outlets and inlets should be mowed monthly during the growing season to prevent the growth of trees and shrubs. Additionally the accumulation of sediment within the practices should be monitored and when sediment accumulation within a practice has visibly exceeded the capacity, it should be removed by a dredging process (or equivalent). It is expected that sediment will have to be removed from these areas every 10 -- 20 years. • Catch basinsldrywells should be inspected annually and after all major storm events (e.g. after each event where 3 inches of rainfall is exceeded in a 24 hour period). Debris and litter should be removed from the basins and manholes during these inspections. Sediment will have to be removed from the basins either manually or by a vacuum truck when 10% of the available capacity has been used up (e.g., for a 12" sump, when the depth of sediment exceeds 1.2"). In addition, the structures should be repaired and/or replaced on an as -needed basis. The grassed swales will have to be inspected on an annual basis and after all major storm events (e.g. after each event where 3 inches of rainfall is exceeded in a 24 hour period). During the inspection, all debris and litter should be collected and removed. The swales should be checked for erosion, and all eroded areas should be stabilized with topsoil, seed and mulch immediately. All culvert outlets and inlets should be checked for clogging and the accumulation of sediment, and cleaned as needed. The grassed swales should be mowed at least twice during the growing season (e.g., middle and end of the growing season) to prevent the growth of trees and shrubs, and to control weed growth. Upon completion of construction, the Town of Wappinger will take ownership of the remaining stormwater management practices within the property. Long term inspection and maintenance of the stormwater management practices will also be the responsibility of the Town of Wappinger. Morris Associates November 9, 2007 E: Idocuments;Genera112011512{)5151 IEISICURRENT DF.IS FOR BROOKVAGE OCT 20fMDEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impact Statement Page 70 POLLUTION PREVENTION MEASURES Non-structural stormwater controls will focus on preventing non -sediment related pollutants from entering stormwater runoff, sediment control structures, storm drainage systems, and receiving bodies of water. Pollutants that may be generated on a construction site and could potentially enter stormwater runoff from the site if not controlled include gasoline, oils, grease, paints, solvents, paper, plastics, Styrofoam, aluminum cans, glass bottles, solid or liquid waste and raw materials such as sand, aggregate and cement. "Good housekeeping" practices shall be used to prevent these pollutants from entering the site stormwater discharges. The following measures are to be taken to control the accidental exposure of materials and substances to stormwater runoff. Solid waste shall be disposed of in waste receptacles of adequate capacity at convenient locations to site workers. Regular collection and disposal of the collected wastes shall occur as needed. • Storage areas will be protected from stormwater in accordance with any manufacturer's guidelines for storage of chemicals, paints, solvents, acids, pesticides, fertilizers, or other potential pollutants. • Raw construction materials shall be stared in areas controlled by retention -type sediment control devices. • Equipment wash down areas shall be designated on site and in areas draining to regularly maintained sediment control devices. Equipment maintenance areas are to be protected from stormwater and shall be designated and shall include appropriate waste receptacles for spent oils, gasoline, grease and solvents. Accumulated waste shall be regularly collected as needed. • Sanitary facilities shall be provided in convenient locations to site workers and shall be adequately maintained. Erosion and Sediment Control The stormwater pollution prevention plan reflects the New York State requirements for erosion and sediment control. To ensure compliance, this plan was prepared in accordance with the New York State standards outlined in the New York Standards and Specifications for Erosion and Sediment Control (2005). Morris Associates November 9, 2007 E: I documen is I Getrerah2OO51205151I EISICURRENT DEB FOR BROOKVALE OCT 2007IDEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental lmpaci S1atemenl Page 71 The erosion and sediment control measures shall be constructed prior to clearing and/or grading of any area of the proposed project. When construction activity temporarily ceases for more than an expected 21 days, areas to be vegetated shall be stabilized with temporary seed and mulch within 14 days of the last disturbance activity. Additionally all erosion and sediment control practices outlined on the erosion and sediment control and grading plans are to be installed prior to disturbance. All practices are to be designed and installed in accordance with the New York Standards and Specifications for Erosion and Sediment Control (2005). A description of the temporary structural measures proposed is as follows: Erosion Control I�easre #h bescr�pt➢on' Check Dams X Stone barriers used across drainage ways Construction Road Stabil. Stabilization of temporary construction access routes Dust Control X The control of dust from disturbance Earth Dike Temporary berm to convey water to a specific area Level Spreader Outlet for concentrated runoff that disperses flow uniformly Pipe Slope Drain A temporary structure placed from top of slope to bottom Perimeter Dike/Swale Temporary ridge of soil located to the perimeter of the site Portable Sediment Tank Compartmented tank or container used to trap sediment Rock Dam Rock embankment Sediment Basin Temporary barrier or dam across a drainage way Sediment Traps X Excavated area to trap and retain sediment Silt Fence X Temporary geo-textile fabric barrier Stabil. Construction Entrance X Aggregate underlain with geo-textile where traffic enters site Storm Drain Inlet Protection X Temporary permeable barrier installed around storm inlets Straw/Hay Bale Dike Barrier of straw or hay used to intercept runoff Access Waterway Crossing Temporary waterway. crossing Storm Drain Diversion Diversion of storm drains Temporary Swale X A temporary excavated drainage way Turbidity Curtain Flexible impenetrable barrier used to stop sediment Water Bar X Diagonal channel or ridge to convey water Table 3,1-12 Temporary Erosion Control Measures Morris Associates November 9, 2007 E: (documents l Genera11200512I)51511 EISV CURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION. doc 9 Brookvale Subdivision Drafl Fnvironmental Impael Sladement A description of the vpnatativP mp-q zi irac nrnnncori is ao Fnlln .,r Page 72 Irretative Ni+aasur�s � �, U.is y D��F��S;iiort � _ s Brush MattingWillow whips p used for bank stabilization Dune Stabilization Stabilization of Sand dunes with vegetation Grassed Waterway Vegetated Swale Mulching X Use of straw along with vegetation Protection of Vegetation X Protection of existing plants Recreational Area Imp. Establishment of grasses & trees to improve recreation Seeding X Use of grass seed for stabilization Sodding Use of sod mats Straw/Hay Bale Dike Barrier of straw or hay used to intercept runoff Streambank Protection X Protection of streambanks using rock or vegetation Temporary Swale X Temporary stone or grass channel Topsoiling Spreading and depth of topsoil Vegetating Waterways Vegetated drainage way, swale, or waterway uufe o. i- I.3 vegeiailve troslon t;ontrol Measures A description of the permanent structural measures proposed is as follows: Rerrnan�nt Measures to Use De ortption Debris Basin Excavated area for the collection of debris and sediment Diversion Movement of water around the site Grade Stabil. Structure Structure designed to stabilize head cutting of streams Land Grading Grading of slopes to prevent erosion Lined Waterway (Rock) Rip -rap fined drainage way Paved Channel Concrete lined drainage way Paved Flume Concrete lined outlet Retaining Wall Soil retention structures Rip -Rap Slope Prot. Stabilization of eroding slopes with rock Rock Outlet Protection X Protection of outlet pipes using rip -rap Streambank Protection Stabilization of eroding streambanks with designed material 1 aUle 3.1-14 Permanent Erosion Control Measures Morris Associates November 9, 2007 E: IdocumentsV GeneralV 10051205151 V EISICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivislori Draft Environmental Impact Statement H aescrlpuon of ine Dio-iecnnical measures proposea is as TOIIOWS: Page 73 •i r ��' x'"' ti �. m aIx� „ �r�-fe+ctitl7ical -pleasures Descript�brr r lyse Brush Matting Willow whips used for bank stabilization Wattles I I Willow bundles used for bank stabilization I Coconut Roll I I Fiber roll used as a check darn Table 3.1-15 Bio -technical Erosion Control Measures EROSION AND SEDIMENT CONTROL MAINTENANCE These are the minimum required inspection and maintenance practices that shall be used to maintain erosion and sediment controls. A combination of temporary and permanent erosion control measures shall be installed on site per the provided plans. All catch basins and drainage inlets are to be protected using filter fabric drop inlet protection, hay bales will be provided where necessary. All inlets and outlets of drainage pipe and culverts will be stabilized with rock rip -rap outlet and inlet protection. Slopes and other disturbed areas will be protected with silt fence and shall be temporarily seeded and mulched during the construction phase as necessary. Excavated stockpile soil and other material will be stabilized on site in a temporary soil stockpile. The area in which the soil will be stockpiled will be determined and located as necessary during the course of construction. Upon completion of construction, any temporary sediment and erosion control measures will be removed from the site and the site will be stabilized with a permanent seed mixture. Once permanent seeding has occurred the area will be mulched in accordance with the plans. Stone check dams shall be spaced along the length of the swales. The check dams shall be anchored in the channel by a cutoff trench and lined with a filter fabric to prevent soil migration. The check dams shall be inspected after each rainfall event and any damage shall be corrected immediately. If significant erosion has occurred, a liner of stone or other suitable material shall be placed within that section of the channel. Sediment accumulated behind the dam shall be removed and disposed of. Replace stones as needed to maintain the design cross section of the structures. Temporary sediment basins shall be located where specified on the Erosion & Sediment Control Plans. Sediment shall be removed from the temporary sediment basin(s) when 50 percent of the design capacity is Morris Associates November 9, 2007 E. l documents iGenera1120051205IS] VSICURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Drnll Environmental lmpact Statement Page 74 reached. This sediment shall not be placed downstream from the embankment, adjacent to a stream, floodplain or wetland. Dewatering of the sediment basin(s) shall be done over a 10 hour period in accordance with the New York Standards and Specifications for Erosion and Sediment Control (2005). A mechanical pump shall be installed to dewater the basins. When all contributing drainage areas have been properly stabilized the resulting sediment deposits are to be removed and safely disposed of. It should be noted that temporary sediment basins are to be located at the proposed stormwater management practice locations. The temporary sediment basins are to be excavated to a depth no greater than that specified in the above table in order for the proposed stormwater management practices to infiltrate the runoff through the existing soil layers once construction has finished. Vegetative and structural erosion control practices shall be inspected, maintained, repaired, or cleaned as per the Construction Inspection Log on a weekly basis, or after rain events greater then 0.5" over 24 hours in accordance with the New York Standards and Specifications for Erosion and Sediment Control (2005). Such practices are to be inspected weekly, monthly, and quarterly during the course of construction and within 24 hours of 0.5" of precipitation or more. Such inspections are to be conducted by either a New York State Licensed Professional Engineer or Certified Professional in Erosion and Sediment Control (CPESC). On completion of site and or phase stabilization all temporary erosion and sediment control measures shall be removed by the contractor. Any permanent erosion and sediment control measure shall be inspected to assure that they are installed as per the plans and are will function properly. Morris Associates November 9, 2007 F,.,ldncnmenWGenera112 OW0515IIEIMCURRENTLEISFOR BROOKVAGEOCT20070EISNOVEMBER 2007SUBMISSION.doc Brookvale Subdivision Draft Environmental Impoel Solement Page 75 CONCLUSION OF SWPPP This Stormwater Pollution Prevention Plan will minimize erosion and sediment problems on land undergoing urban development as well as meet New York State Department of Environmental Conservation pollutant removal goals, reduce channel erosion, prevent overbank flooding, and help control extreme floods. The result is a project that is compatible with the preservation, protection and conservation of the wetlands and minimizes any adverse impacts on the function and benefits of the wetlands. In addition, the existing wetlands throughout the site are to be cleaned of existing trash and debris in order to enhance aesthetic appearance, functionality, and wildlife values. Morris Associates November 9, 2007 Er Idocumen fsI Gen eraA200512051511EISI CURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBF. R 2907 SUBMISSION. doc Brookvale Subdivision Draft Environmental Impact Stalement 3.2 Wetlands Existing Conditions Page 76 Terrestrial Environmental Specialists (TES) performed wetland delineation on the site in May 2003. Federal and Town Wetlands were re -delineated by Michael Nowicki of Ecological Solutions, LLC (ES) during March 2005 in accordance with the specifications outlined in the Routine Delineation Method in the Corps of Engineers Wetlands Delineation Manual, Technical Report Y-87-1 and Town of Wappinger Local Wetland Ordinance. This included a review of published data and field investigations and sampling. In addition, each original wetland boundary flag placed by TES was survey located by Ray Heinsman Land Surveyor and each wetland flag placed by Michael Nowicki of Ecological Solutions, LLC for Town regulated wetlands was survey located by Eastern States Engineering. The Town of Wappinger reviewed and accepted the wetland delineation in November 2005. On September 14, 2006 the New York State Department of Environmental Conservation (NYSDEC) reviewed the site in the field and determined that Wetland "A" and "Al" are state regulated due to the distance (less than 165 feet) from State regulated wetland WF -5 across Spook Hili Road from the site. On February 2, 2007, Heather Gierloff of the NYSDEC validated the DEC wetlands that have been located on the site. Wetland boundary delineations as validated remain valid for 10 years unless existing exempt activities, area hydrology, or land use practices change (e.g., agricultural to residential). After 10 years the boundary must be revalidated by the NYSDEC staff. Revalidation may include a new delineation and survey of the wetland boundary. A. Data Review. The data review for this wetland delineation included the review of NWI maps and NYSDEC Freshwater Wetland Maps for previously identified wetlands on the site. It also included a review of the Dutchess County Soil Survey to determine if soils on the site were conducive to wetland formation. B. Field Investigation and Sampling. Federal wetlands were delineated by TES based on the three -parameter approach identified in the 1987 Wetland Delineation Manual currently utilized by the USACE. Town regulated wetlands were delineated by ES based upon the identification of any one of the three mandatory criteria for wetland determination as outlined in the 1989 Wetland Delineation Manual: dominant hydrophytic vegetation, and/or hydric soils, and/or evidence of wetland hydrology. To identify the wetlands, the site was walked and the general characteristics of the property observed. The Routine Methodology procedure for wetland delineation was used. Sample transects were established at each wetland. Each transect consisted of at least two sample points, one in the wetland and one in the adjacent upland. Dominant vegetation around each sample point was identified and its percent cover quantified. Areas with an appropriate landscape position were checked in detail for the presence of wetland hydrologic indicators. Soil profiles were then observed and characterized at each point. Morris Associates November 9, 2007 E: (documents (Genera1120051205151 WOCURRENT DEIS FOR BROOKV 1LE OCT 20071DEIS NOrEMBER 2007 SUBMISSION doc Brookvale Subdivision Draft Environmental Impact Statement The detailed field investigation included: 77 Identification of vegetation species with a dominance of hydrophytic plants and areas containing transitional but primarily wetland -oriented species. 2. Determination of features of hydric (poorly and very poorly drained) natural soils, transitional but wetland -oriented soils, and disturbed and filled soils that display an aquic (water -saturated) regime. 3 Observation of site features displaying evidence of wetland hydrology based on the presence of inundated areas, apparent high seasonal water tables, and evidence of saturation within 12 inches of the surface (considered the root zone) during sufficient periods during the growing season to provide for anaerobic/hydric soil conditions. Test plots were made at selected locations on the property to identify the various habitat types and to establish the wetland -upland interface. The wetland border was marked with pink flagging tape and was based on the test plot data and observations made at mini -test plot locations along the wetland border. Each distinct wetland area was designated with a letter and each wetland flag within a wetland area was numbered sequentially (e.g. Al, A2, etc.). The results of the site observations indicate that a total of two (2) separate wetlands that exhibit wetland hydrology and/or soils and/or vegetation are present on the property (see Figure B-1 Wetland Boundary Map). The flag series and corresponding wetland classification nomenclature (Cowardin et al., 1979) are as follows: Site Wetlands 1. Wetland A and Al - Palustrine Forested (PFO1 E) — (13.71 acres) Jurisdiction: Town of Wappinger Wetlands, NWI Wetlands and NYSDEC Wetlands 2. Wetland B - Palustrine Forested (PFO1 E) — (3.34 acres) Jurisdiction: Town of Wappinger Wetland and NWI Wetland The identified wetlands can be characterized as both falling under the classification of Palustrine Forested Wetland (PFO1 E). Plant community composition observed within the wetlands is more or less uniformly Palustrine Forested. Morris Associates November 9, 2007 E. I documen til GeneraA200n20515 i USlCURRENT DEIS FOR BROOKVALE OCT 20071 DEIS NOVFMBER 2007 SUBMISSION doc 44:MsklProj1205151k4wg16rookvale w4ands,dwg, TOWN OF WAPPINGER WETLAND MAP, W25CMskS6:09 AM, A Owny Breier FIELosi _ eaten_ - MERE 9 EAU Cry E3 m o.oa m� g in a W o D *o �. X> m g �t cra i 'N z z g o Z z Brookvale Subdivision Draft Environmental lmpact Statement Page 80 Hydrology Wetlands AIA1 exhibited one or more of the following: (1) small pooling areas of water; and/or (2) flowing water. Flowing water was observed within the watercourse that enters the property via culvert across Spook Hill Road, flows across the front of the property, and exits through a culvert across Devine Drive, and continues off the proposed site. Wetland B receives water primarily through overland sheet flow and precipitation. There is also a small seep area that contributes a minor amount of flow to the wetland. Hydrological indicators identified within the wetlands included soil saturation, watermarks, drift lines, drainage patterns, and water stained leaves. Wetland Vegetation The following section discusses wetland -specific plant communities identified during wetland delineation activities, and lists the species identified within each stratum, (i.e. herbaceous, shrub, and tree (overstory)). Within Wetland AIA1, herbaceous species identified included Symplocarpus foetidus (skunk cabbage). Shrub species observed included Acer rubrum (red maple), and Lindera benzoin (spicebush). Tree species included Acer rubrum (red maple) and Ostrya virginiana (eastern hophornbeam)_ Herbaceous vegetation identified within Wetland B included Onoclea sensibilis (sensitive fern), Osmunda cinnamonea (cinnamon fern), and Viola sp. (violet). Shrub species included Lindera benzoin (spicebush) and Acer rubrum (red maple). Tree species included Acer rubrum (red maple), Ostrya virginiana (eastern hophornbeam), and Fraxinus pennsylvanica (green ash). Wetland Functional Evaluation An assessment of wetland functions and values was conducted on the wetlands that were identified and delineated on the referenced property. This was done by Michael Nowicki of Ecological Solutions, LLC. Using the Hollands and Magee Wetland Functional Assessment Method, 6 distinct wetland functions and values were assessed for the delineated wetlands on the site. This method yielded an objective, semi- quantitative index of each wetland. This assessment had two major objectives: Objectively identify the functions and values provided by each of the wetlands identified on the site. 2. Provide baseline data with which the Applicant could work in planning land uses, and against which the Applicant could assess potential impacts of proposed development of the site. Morris Associates November 9, 2007 E:1documenisIGeneraA200512051511EIMCURREN7'DEIS FOR BROOKVALB OCT 20070EIS NOVEMBER 2007 SUBMISSIONdoc Brookvale Sui7di.vision Drafd Environmental hnpaat Statemend Page 81 Wetlands are legally protected because of the functions they perform and the benefits that society reaps from those functions. Wetland functions are chemical, physical, and biological processes that wetlands naturally perform as a matter of course, such as absorption of nutrients or floodwaters, or provision of habitat for fish and wildlife. Wetland values are the benefits that society derives from wetland functions, such as flood abatement, or water quality maintenance. The functions and values assessment conducted on the Brookvale property was based on the method outlined in (Hollands and Magee 1985). Hollands and Magee provides for assessment of each wetland for six defined functions and values. Groundwater Recharge/Discharge — the potential for a wetland to serve as a recharge area for an aquifer or as a surface discharge point for groundwater. 2. Flood Water Storage — A wetland's ability to store and attenuate floodwaters during prolonged precipitation events, thereby reducing or preventing flood damage. 3. Water Quality Maintenance — The effectiveness of the wetland in trapping sediments, toxicants or pathogens, and at absorbing, retaining, and transforming or binding excess nutrients, thereby protecting water quality. 4. Biological — The ability of wetlands to provide food, water, cover, or space for wildlife populations typically associated with wetlands or their adjacent areas, both resident and migratory. 5. Hydrologic Support — The value placed on a wetland by society for supporting hydrologic functions. 6. Visual Quality/Aesthetics — The value placed on a wetland by society for having visual and/or other aesthetic qualities. Each function or value in the list has a set list of qualifiers for identifying which functions and values are performed or provided by each wetland. In addition to outlining qualifying rationale for each function and value, the data forms also document information on each wetland's size, distance to nearest road or other development, adjacent land uses, position in the watershed, impacts from human activity, tributaries, cover types, and general condition. All of these elements factor into the functions and values assessment. Wetland data and observations for this functions and values assessment were collected during 2005 and 2006 to observe herbaceous plant growth and hydrologic characteristics during the growing season to complete the functions and values assessment. Observations and other published data were used to assess the functions and values of each wetland. Morris Associates November 9, 2007 E.-YdocumentslGene�ai12005120.515IIEISlCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISS1ON.doc Brookvak Subdivision Draft Environmental Impact Statement Page 81 Assessments were performed on wetlands on the site, arbitrarily designated A /All and B for identification purposes. Findings of the assessment are outlined below. Wetland A/A1 - (13.71 acres) is the larger of the two wetlands identified on the property, and consists of forested wetland that primarily receives water through surface sheet flow and from culverts leading into the property. A watercourse was identified in the wetland area, and channelized flow was identified on the northern and southern portions of the wetland. Hydrologic indicators observed included inundation soil saturation, drift lines, drainage patterns, shallow root systems, and water stained leaves. Wetland A is arguably the most functional and valuable wetland system on the property due to its size, diversity of structure and vegetation, and the fact that it has been relatively undisturbed for 40 to 50 years of time. This wetland with its associated 100 -foot Town regulated buffer, however, is not pristine, as evidenced by the utility line Right of Way cut through its length, its ditched or channelized stream, and periodic access from adjacent properties. Wetland B - (3.34 acres) receives water primarily through overland sheet flow, precipitation, and a minor contribution from a small seep area. Hydrological indicators identified within the wetland included soil saturation, watermarks, drainage patterns, and water stained leaves. Wetland B is a small broad -leafed deciduous forested wetland (PF01 E).. It is a red maple-spicebush dominated swamp with a dense understory of skunk cabbage (Syplocarpus foetidus) and false hellebore (Veratrum veride) that is seasonally saturated. Functions and values provided by Wetland B include sediment trapping, nutrient removal, production export, and wildlife habitat. Of these, the most significant functions of this wetland are sediment trapping and wildlife habitat. A copy of the Wetland Functional Evaluation is included in Appendix 6.8. Anticipated Impacts to Wetlands and Wetland Buffers A Federal Section 404 Permit for development activities on the property is not required since no wetland area will be impacted on the property. A NYSDEC Article 24 Freshwater Wetland permit will be required for the entrance road. Town Planning Board approval is required for construction of the entrance road. The buffer areas in these locations are generally young woods that have previously been impacted when the area was pastureland. The upland Adjacent Areas immediately adjacent to the wetland resources are young pioneer forest dominated by red cedar and small maples and oaks, indicating that the upland areas including the Adjacent Areas were extensively cleared during the recent past. Some mature trees (12" dbh) such as Shagbark Hickory are located within the wetland buffer and will remain. The regulated wetland on the property will continue to provide the same functional benefits after completion of the proposed subdivision of the property including: Morris Associates November 9, 2007 E:IdociimenisIGeneraA20051205151IEISICURRENTDEIS FOR BROOKVALE OCT 10071 DE,IS NOVEMBER 2007 SURMISSIONdoe Brook+,ale Subdivision Deaft,Phviranmental Impact Statement Page 83 maintenance of flood, erosion and storm control; control of pollution and sedimentation; and provision of area for wildlife habitat. Short-term physical impacts to regulated wetlands on the site other than outlined above will be avoided by the use of erosion controls throughout the property especially in critical areas adjacent to regulated wetlands. Mitigation Measures Moderate impacts to the Town regulated wetland buffer 1 NYSDEC regulated Adjacent Area on the site will occur for the placement of the entrance road into the site. The buffer area and most of the building portion of the site is pioneer — second growth forest. No large trees (24" dbh) will be removed as a result of the proposed subdivision and wetland buffer encroachments on the property. These encroachments are typically mitigated via the use of sediment and erosion controls and landscaping. In addition, the Applicant is proposing to expand the buffer on the property in other locations and plant the SMB's with wetland vegetation to serve as "wetland mitigation" area both outside and within the 100 -foot wetland buffer area. All single family dwellings on lots that contain wetlands will be situated a minimum of 100 feet from the wetland boundary. Construction in wetland buffer areas will require erosion control measures that can remediate soil and vegetation disturbance. The concern for potential impact to the wetlands on the property is from individual homeowners once the short-term construction of the subdivision is complete. Measures such as the use of planted barriers or split rail fencing at an acceptable location on each lot will tend to keep homeowners from impacting wetland resources on the site. Further mitigation will come from the creation of Conservation Easement, which protects all wetlands on the project site. Town of Wappinger Permit Requirements The Town requires that an applicant avoid and minimize disturbances to wetlands under its jurisdiction. No fill material will be placed in jurisdictional wetland areas. Activity within the 100 foot buffer area will require Planning Board approval and mitigation for the impacts. Wetland establishment will be provided on the site through the planting of stormwater detention basins as mitigation for the wetland buffer impact on the site for the proposed entrance road. A wetland habitat consisting of a wooded wetland with a shrub understory, leading to an emergent wetland, to a shallow marsh to a small open pond will be developed as a progression of habitats to establish the area to provide for a varied vegetative and wildlife habitat. Typical wetland mitigation plantings (shrubs) include: Morris Associates November 9, 2007 E; I documents 1 Genel'al120l1512051511EIS1 C'URREN7' DEIS FOR BROOKVALF. OCT 21071 DEIS NOVEMBER 2007 SUBMISSION. doc Brookvaie Subdivision Draft Environmental Gnpact Statement Page 84 Cornus stolonifera - Red Osier Dogwood Viburnum dentatum - Arrowood Clethra alnifolia - Sweet Pepperbush Ilex verticillate — Winterberry Vaccinium corymbosum - Highbush Blueberry Lindera benzoin - Spicebush The SMB's will be provided on the site for nutrient removal and water quality improvement. A Storm Water Pollution Prevention Plan (SWPPP) prepared by Morris Associates details the steps necessary to control stormwater generated on-site as a result of increased impervious surfaces. According to the report, the site has been designed to facilitate quality and quantity treatment of stormwater on the site. Runoff from land areas that are not collected by the stormwater management system will sheet flow off the property through natural patterns and surface conditions. The creation of detention basins will function to maintain post -development peak stormwater discharges at and below their pre -development levels. The proposed development is designed to integrate the existing runoff patterns and natural features with little disturbance. The natural features on-site will provide environmentally preferred stormwater management mitigation by improving runoff quality through the use of open-channel/wetland filtration, absorption, and evaporation. The stormwater analysis illustrates that the proposed system will function properly, provide water quality enhancements, and require minimal maintenance to insure continued performance. During construction, appropriate soil erosion and sediment control measures will reduce any potential impacts to these regulated resources. Morris Associates November 9, 2007 E: I documenlrlGeneraA200512451511EISICURRENT DEIS FOR BROOKVALE OCT 20070EIS NOVEMBER 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impart Statement Page 8.5 3.3 Traffic As indicated previously, the Brookvale Subdivision is a proposed 54 -unit, single-family subdivision that will be constructed on one vacant parcel located along Spook Hill Road in the Town of Wappinger, Dutchess County, New York. Currently, the completion date of this proposed project will be sometime after 2010. To be in accordance with this date, a design year of 2010 has been utilized to evaluate transportation and traffic concerns. John Collins Engineers, P.C. performed capacity analyses to determine existing and future traffic operating conditions at relevant area intersections as identified in the Scoping Document. The analyses were done for unsignalized intersections only. While a complete copy of the Traffic Impact Study is provided in Appendix 6.5, the following is a brief description of the analysis method that was utilized in this study: Existing Transportation Conditions A request was sent to the Dutchess County Safety Board to obtain accident records in the immediate area surrounding the proposed subdivision. Records on all accidents occurring in this area between 2001-2005 are included. There were 114 accidents reported on roads that can be found within a 500 -foot radius of the proposed subdivision (22.8 accidents/year), Of the 114 accidents, none were fatal, however, 47 people reported injuries. Causes of the accidents were the following: driver error, weather conditions, alcohol involvement, animal action, etc. A full copy of these reports can be found in Appendix 6.6. The proposed subdivision will have access from both Old Hopewell Road (Dutchess County Route 28) and Myers Corners Road (Dutchess County Route 93), Figure 3.3-1 shows the existing driving conditions in the area along Spook Hill Road, between Myers Corners Road and Old Hopewell Road. Descriptions of the existing traffic conditions on these and other major area roadways are as follows: ■ Spook Hill Road and Myers Corners Road Spook Hill Road intersects with Myers Corners Road at a "T" shaped, unsignalized intersection. All approaches to the intersection consist of one lane and the Spook Hill Road approach is controlled by a "stop" sign. Capacity analysis conducted utilizing the Year 2006 Existing Traffic Volumes indicates that the Spook Hill Road approach is currently operating at a Level of Service "D" during the Weekday Peak AM Highway Hour and is currently operating at a Level of Service "F" during the Weekday Peak PM Highway Hour. The Myers Corners Road left turn is currently operating at a Level of Service "A" during each of the peak hours. Morris Associates November 9, 2007 E. IdocumenlslGeneraI0005Q051.511EMCURRENT DEIS FOR BROOKVA! E 00' 20071DE1S NOVEMBER 2007 SURMISSION.doc Brookvale Subdivision Draft Environmentallmpact Statement 86 Capacity analysis conducted utilizing the Year 2010 No -Build Traffic Volumes indicates that the Spook Hill Road approach is projected to operate at a Level of Service "E" during the Weekday Peak AM Highway Hour and will continue to operate at a Level of Service "F" during the Weekday Peak PM Highway Hour. The Myers Corners Road left turn is projected to operate at a Level of Service "B" or better during each of the peak hours. It should be noted that it is not uncommon for the side road to operate with delays while all other movements operate at better Levels of Service. Capacity analysis conducted utilizing the Year 2010 Build Traffic Volumes indicates that the Spook Hill Road approach is projected to continue to operate at a Level of Service "E" during the Weekday Peak AM Highway Hour and is projected to continue to operate at a Level of Service "F" during the Weekday Peak PM Highway Hour, The Myers Corners Road left turn is projected to continue to operate at a Level of Service "B" or better during each of the peak hours. It should be noted that the Brookvale Subdivision will be adding some 27 vehicles to this intersection during the Weekday Peak AM Highway Hour and some 35 vehicles to this intersection during the Weekday Peak PM Highway Hour. This represents an increase in traffic of 2% at this location, which equates to approximately one year's growth in traffic. ■ Spook Hill Road and Old Hopewell Road Spook Hill Road intersects with Old Hopewell Road at a "T" shaped, unsignalized intersection. All approaches to the intersection consist of one lane and the Spook Hill Road approach is controlled by a "stop" sign. Capacity analysis conducted utilizing the Year 2006 Existing Traffic Volumes indicates that the Spook Hill Road approach is currently operating at a Level of Service "C" during the Weekday Peak AM Highway Hour and is currently operating at a Level of Service "E" during the Weekday Peak PM Highway Hour. The Old Hopewell Road left turn is currently operating at a Level of Service "A" during each of the peak hours. Capacity analysis conducted utilizing the Year 2010 No -Build Traffic Volumes indicates that the Spook Hill Road approach is projected to continue to operate at a Level of Service "C" during the Weekday Peak AM Highway Hour and is projected to operate at a Level of Service "F" during the Weekday Peak PM Highway Hour. The Old Hopewell Road left turn is projected to continue to operate at a Level of Service "A" during each of the peak hours. Morris Associates November 9, 2007 E; WocurnenlslGeneraA2005i205151 T1SlCURRF.NT DCIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSIONdoc Brook vale Subdivision Draft. Environmental Impact Slate men t 87 It should be noted that it is not uncommon for the side road to operate with delays while all other movements operate at better Levels of Service. Capacity analysis conducted utilizing the Year 2010 Build Traffic Volumes indicates that the Spook Hill Road approach is projected to continue to operate at a Level of Service "C" during the Weekday Peak AM Highway Hour and is projected to continue to operate at a Level of Service "F" during the Weekday Peak PM Highway Hour. The Old Hopewell Road left turn is projected to continue to operate at a Level of Service "A" during each of the peak hours. It should be noted that the Brookvale Subdivision will be adding some 21 vehicles to this intersection during the Weekday Peak AM Highway Hour and some 28 vehicles to this intersection during the Weekday Peak PM Highway Hour. This represents an increase in traffic of 2% at this location, which equates to approximately one year's growth in traffic. ■ Spook Hill Road and Proposed Site Access As indicated previously, access to the subdivision is proposed via a two-lane access road connection to Spook Hill Road. The site access will be "stop" sign controlled. Capacity analysis conducted utilizing the Year 2010 Build Traffic Volumes indicates that all movements to the access road will operate at a Level of Service `B" or better during each of the peak hours. The following nine figures in this section, from the Traffic Impact Study completed by John Collins Engineers, P.C., examine existing traffic conditions and compare them with "Build" and "No -Build" conditions. Morris Associates Noveniber9, 2007 E. ldoceimentslGener4112005}205151 tEIS1CURRENT DEIS FOR BROOKVALE OCT 2007008 NOVEMBER 2007 SUBMISS10N.doc ;i,v_,n_enne ae.aeael eeruf T -Aft P..0 AOS F-111 3ROOKVALE SUBDIVISION YEAR 2006 EXISTING TRAFFIC VOLUMES -OWN OF WAPPINGER, NEW YORK WEEKDAY PEAK AM HIGHWAY HOUR SI -Ilii COLL_ NS ENGINEERS, P.C. BROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK 101-i1q COLUfI,'S ENGINEERS, P.C. YEAR 2006 EXISTING TRAFFIC VOLUMES WEEKDAY PEAK PM HIGHWAY HOUR Brookvale Subdivision DraJi Environmental impact Statement Page 91 Potential__Transportation Impacts Estimates of future site generated traffic volumes associated with the 54 -lot subdivision were based on information published in the Institute of Transportation Engineers Trip Generation, 6tt' Edition, 1997. The resulting peak hour trip generation rates and corresponding site generated traffic volumes for the proposed subdivision are summarized in Table 3.3-1. BROOKVALE SUBDIVISION ENTRY HTGR* VOLUME EXIT HTGR* VOLUME TOTAL VOLUME 54 SINGLE FAMILY HOMES WEEKDAY PEAK AM HIGHWAY HOUR 0.22 12 0.65 36 48 WEEKDAY PEAK PM HIGHWAY HOUR 0.72 40 0.42 23 63 He HOURLY I HIH t�ENkKA f IUN RA I ES (H FUR) ARE BASED ON DATA PUBLISHED BY THE INSTITUTE OF TRANSPORTATION ENGINEERS (ITE) AS CONTAINED IN THE TRIP GENERATION HANDBOOK, 7th EDITION, 2003. ITE LAND USE 290 - SINGLE FAMILY HOME RATES Table 3.3-1 Trip Generation Rates In order to project the Existing Traffic Volumes to a future design year, 2010, John Collins Engineers, P.C. was contracted to perform a traffic study. The 2010 No -Build traffic volumes for the weekday peak AM and peak PM are shown on Figures 3.3-2 and 3.3-3. To assign the site generated traffic volumes to the key intersections in the vicinity of the site, an arrival and departure distribution was developed. The distributions were determined based on a review of existing traffic patterns in the area, which are illustrated on Figure 3.3-4. The site generated traffic volumes were added to the various intersections based on the arrival/departure distributions. These volumes were combined with the design year No - Build Traffic Volumes to obtain the 2010 Build Traffic Volumes for each of the intersections, for each of the weekday peak hours. Figures 3.3-5, and 3.3-6 illustrate the site generated traffic volumes, while Figures 3.3-7 and 3.3-8 show the 2010 Build Traffic Volumes for each of the weekday peak hours. Morris Associales November 9, 2007 F,: VocumenlslGenet 0 2 003 1205 151 WIMCURRF.NT DEIS FOR BROOKYALE OCT 20VDEIS NOVEMBF,R 2007 SUBMISSION.doc 4--.627 7-28 AAVFQ? �nonir nrrte".. 3ROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK 3I-114 COLLNS E:NGII FERS, P.C. YEAR 2010 NO -BUILD TRAFFIC VOLUMES WEEKDAY PEAK AM HIGHWAY HOUR BROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK 'OHN COL[ INS ENGINEERS, P,C. YEAR 2010 NO -BUILD TRAFFIC VOLUMES WEEKDAY PEAK PM HIGHWAY HOUR BROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK JOHN COLLINS ENGINEERS. P.C. ARRIVAL/DEPARTURE DISTRIBUTION BROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK JOHN COI_LINS ENGIN17FRS, P.C. SITE GENERATED TRAFFIC VOLUMES WEEKDAY PEAK AM HIGHWAY HOUR BROOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK JOHN COLLINS FNGINEERS, P.C. SITE GENERATED TRAFFIC VOLUMES WEEKDAY PEAK PM HIGHWAY HOUR �E 3ROOKVALE SUBDIVISION GOWN OF WAPPINGER, NEW YORK -5.27 �I MYFRS MPNf`R� pnan IOHN COf._(wIKS EHIGINFE_RS, P.C. YEAR 2010 BUILD TRAFFIC VOLUMES WEEKDAY PEAK AM HIGHWAY HOUR v 3HOOKVALE SUBDIVISION TOWN OF WAPPINGER, NEW YORK F 710 �� dYFR: r`n��l�oc onnn 1OHI4 COLLINS FNGINFE RS, P.C. YEAR 2010 BUILD TRAFFIC VOLUMES WEEKDAY PFAK PM HIGHWAY HOUR Broobalc Subdivision Draft Environmental Impact Statement Page 99 To estimate the potential impacts of the proposed project on local area roadways, a capacity analysis was undertaken at each of the intersections for each of the weekday AM and PM peak hours utilizing 2010 No -Build and 2010 Build Traffic Volumes (see Figures 3.3-9 and 3.3-10)- The results of the capacity analyses and any recommended improvements are described below: Table 3.3-2 level of Service Summary Table TABLE NO, 2 LEVEL OF SERVICE SUMMARY TABLE THE ABOVE REPRESENTS THE LEVELS OF SERVICE. AND AVERAGE TOTAL. DELAY IN SEGONOS, B (10,9); FOR THE UNSIGNALIZF.D INTER8ECTIONS, Description of Proposed Emeraency Access An emergency access will be provided for the Brookvale Subdivision through a 50 -foot wide, 315 -foot long extension of the cul-de-sac on Fieldstone Boulevard. Fieldstone Boulevard is an existing road in an adjacent subdivision to the south of the Brookvale Subdivision. This emergency access allows an alternative way of entering/exiting the subdivision in the event of an emergency. There are two emergency gates, one placed at each end of the emergency access. Proposed Sight Distances An analysis of the available sight distances compared with the required sight distances as per the Town of Wappinger and the Department of Public Works can be found on the Morris Associates November 9, 2007 E.IdocumenlslGener-al120051205I511EISICURRBNT DELS FOR BROOKVALE 00'20071DEIS NOVEMBER 2007 SUBMISSIONdoc - LOCAPiON YEAR 2Wd EXISTING AM Pm '(EAR 2010 NO -BUILD' AM PM YEAR 2090 BUILD AM PM - I- OLD HOPEWELL ROAD & SPOOKHILL ROAD UNSIGNALIZED EASSOUNp LEFT t THROUGH SOUTHSOUNO LEFT 1 RIGHT A (8,4) C (15.2} A (8-D) E (38.9} A(6,5) C {58,1) A(OA) F (65.0) A (8.6) C (19.1) A (9.2) F (78-5) 2- RS CORNERS ROAD & spoMHILL ROAD UNSIGNALIZEU WESTBOUND LEFT tTHROUG11 NORTHBOUND LEFT I RIGHT A(8,8) D (28.5) A(9,8) F (63.6) A(8,8) E (40.6) a(10.2) F(1305) A(SA) F (49,8) 8(10.3) F (181.5) 3. 3P00f<HILL ROAD & PROPOSED SITE ACCES UNSIGNALIZED SOUTHROUND LEFT /THROUGH WESTBOUND LEFT 1 RIGHT --� ----- ------ -.- -- ----- ---_. --. A(73) A (9.5) A (T7] B (10.2) THE ABOVE REPRESENTS THE LEVELS OF SERVICE. AND AVERAGE TOTAL. DELAY IN SEGONOS, B (10,9); FOR THE UNSIGNALIZF.D INTER8ECTIONS, Description of Proposed Emeraency Access An emergency access will be provided for the Brookvale Subdivision through a 50 -foot wide, 315 -foot long extension of the cul-de-sac on Fieldstone Boulevard. Fieldstone Boulevard is an existing road in an adjacent subdivision to the south of the Brookvale Subdivision. This emergency access allows an alternative way of entering/exiting the subdivision in the event of an emergency. There are two emergency gates, one placed at each end of the emergency access. Proposed Sight Distances An analysis of the available sight distances compared with the required sight distances as per the Town of Wappinger and the Department of Public Works can be found on the Morris Associates November 9, 2007 E.IdocumenlslGener-al120051205I511EISICURRBNT DELS FOR BROOKVALE 00'20071DEIS NOVEMBER 2007 SUBMISSIONdoc Brookvafe Subdivision Draft EnvironmenlallmpactStatement Page 100 Sight Distance Plan and Sight Distance Profiles sheets, located in Appendix 6.12 of this DEIS. Transportation Mitigation Measures Based on the results of the capacity analysis, and the implementation of the improvements outlined below, it is the professional opinion of John Collins Engineers, P.C., that the proposed subdivision will not result in a significant negative traffic impact on the surrounding roadways, and the roadways will accommodate the additional traffic generated at acceptable levels of service. Safe and efficient access to the site can be developed from Spook Hill Road based on current conditions. Also note that any traffic impact will be significantly less than that created by either the Conventional layout, or the original proposed 94 -lot subdivision. School Bus Routes In Vicinity of Project Myers Corners Elementary School Route # MC18 60 SPOOK HILL RD REGGIE DR @ 1 DARA LN REGGIE DR @ STANLEY RD SPOOK HILL RD @ REGGIE DR (NORTH) SPOOK HILL RD @ ROBERTS RD NR PARK 23 ROBERTS RD SPOOK HILL RD @ MINA DR SPOOK HILL RD @ NANCY ALEEN DR SPOOK HILL RD @ HAMLET CT BLACKTHORN LP @ PRIMROSE CT 2. Route # MC21 12 NICOLE DR LENNY CT @ NICOLE DR KENDALL DR @ LENNY CT KENDALL DR @ NICOLE DR 14 ARDMORE DR 5 ARDMORE DR 100 ARDMORE DR ARDMORE DR @ ORCHARD DR 17 ORCHARD DR FARMS END RD @ ORCHARD DR Morris Associates November 9, 1007 E:WocumenlslGeneraA2005Q051.51YEOCURRENT DEIS FOR BROOKVRI.E OCT20070EIS NOVF,MBF,R 2007 SUBMISSION.doc Brookvale Subdivision Draft Environmental Impact Statement 103 SPOOK HILL RD SPOOK HILL RD @ FIELDSTONE BLVD 80 FIELDSTONE LP/FIELDSTONE BLVD SPOOK HILL RD @ REGGIE RD (SOUTH) Wappingers Junior High School Route # WJ21 ALLADIN CT @ BEL AIR LN 55 LOSES RD LOSEE RD @ SUCICH PL 3 ARDMORE DR ARDMORE DR @ FARMS END RD SPOOK HILL RD @ FIELDSTONE BLVD SPOOK HILL RD @ REGGIE DR (SOUTH) REGGIE DR @ STANLEY DR MINA DR @ STANLEY RD MINA DR @ SCOTSE RD 9 NANCY ALEEN DR SPOOK HILL RD @ MINA DR SPOOK HILL RD @ ROBERTS RD NR PARK SPOOK HILL RD @ HAMLET CT Roy C Ketcham High School Route # RK17 229A OLD HOPEWELL RD 3 ARDMORE DR ARDMORE DR @ FARMS END RD SPOOK HILL RD @ REGGIE DR (SOUTH) REGGIE DR @ STANLEY RD SPOOK HILL RD @ REGGIE DR (NORTH) SPOOK HILL RD @ NANCY ALEEN DR SPOOK HILL RD @ ROBERTS RD SPOOK HILL RD @ HAMLET CT MYERS CORNERS RD @ BLACKTHORN LP (WEST) Morris Associates November 9, 2007 F. ldoruments I Genero112005120.5151 IEMCURRENT DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION doe 101 Brookvale Subdivision Drgfd Environmental Impacl Statement Page 102 3.4 Land Use and Community Character The proposed project site is located in the southeastern portion of the Town of Wappinger near both Old Hopewell and Myers Corners Roads. The site is composed of one parcel totaling 89.51 acres and is zoned in the R-40 residential district. Land Uses of the Site and Surrounding Area The project site is currently vacant land surrounded by an area of low density residential, recreational, and some commercial uses. The area in close proximity to the proposed project site is primarily comprised of single-family homes. The Town of Wappinger encompasses approximately 30 square miles and has a population of 26,274 residents. The Towns of LaGrange and East Fishkill to the west and south are primarily suburban communities with some commercial uses. The Towns of Union Vale, Dover and Pawling to the north and east are a mix of rural open space, farming and residential uses (see Figure 3.4-1, "Aerial Photograph"). Morris Associales November 9, 2007 E.,I documenlslGeneraA200512051511EMCURRENT DEIS FOR BROOKYALB OCT 20070EIS NOVEMBER 2007 SUBMISSION. doe t t - q:� ,mss:. - a•( j. � .. .. , 9 �> �f who. - e� e- Brookvale Subdivision Draft Environmental Impact Statement Page 104 The increasing population, as well as average household incomes throughout Dutchess County,' confirms the need and suitability for additional single-family homes in the area. This need is recognized by the Town of Wappinger, which advocates single-family housing and the preservation of open space as "Goals" in the 1988 Town of Wappinger Master Plan. The Plan proposes that the Town of Wappinger remain largely residential. In accordance with the Plan, the Brookvale Subdivision proposes single-family homes in an Average Density layout, which will accommodate the growing market demand for single-family homes while maximizing the conservation of open space. The project also meets many of the goals and objectives of the 2006 proposed Comprehensive Plan that the Town has been in the process of approving. Potential; Impacts to Land Use As previously mentioned in this document, the proposed single-family residence subdivision is located in the R-40 Zoning District. Although the proposed Average Density subdivision allows us to utilize R-20 District lot areas and dimensional requirements, the single family homes being constructed complies with the permitted use regulation in the R-40 District. A detailed review of how each lot meets the minimum requirements of the R-20 District and how the average size of all proposed lots is greater than the R-40 District requirement can be found in the "Zoning Compliance Table", located in Appendix 6.16. With the current setting of the area, including the character of the existing residential development, the amount of open space and vegetation, and given the limited visibility of the project, the proposed Average Density Subdivision is not expected to have a significant negative visual impact on the surrounding environment. With the Average Density layout, lots are smaller in size than in the "As--of-Right" design and are "clustered" together, which reduces the amount of site disturbance and maximizes the amount of undeveloped land. The Average Density design utilizes approximately 6.45 acres for roadways, buildings, and impervious surfaces, 42.89 acres as lawn/landscaped areas, and retains approximately 40.17 acres of conservation easement. In contrast, the Conventional layout would convert approximately 7.58 acres to impervious area, 45.80 acres to lawn and landscaped areas, leaving approximately 36.13 acres of undeveloped land. In accordance with the Town Code of the Town of Wappinger and the 1988 Town of Wappinger Master Plan, the Brookvale Subdivision proposes a 54 -lot single-family residence subdivision in an Average Density layout. As such, the development will not According to information provided by the Dutchess County Department of Planning and Development, httpa/www.dutche,ssnv.guv. and Smart Growth Housing Task Force Report," Dutchess County Department of Planning and Development, 2001. Morris Associates November 9, 2007 F.. I dnc umcnlsV GnneraA2005120 515 1 V EIS) CURRRNT 01,,Y.4 FOR FROOKVALF OCT 20070EIS NOVEMBFR 2007 SUBMISSION• doc Brookvale Subdivision Draft Environmental hyact Statement Page 105 require any area variances. Please see Figure 1.1-6, "Average Density Subdivision Plan" for an illustration of lot layout. The proposed development will help fill the need for additional single-family housing in the area while concurrently maximizing the preservation of recreational lands and open space. The plan is consistent with the goals and. objectives set forth in the Town of Wappinger Comprehensive Plan and underlying zoning. Land Use and Zoning Mitigation Measures The proposed subdivision is consistent with the permitted uses in the R-40 Zoning District and with land uses in the area surrounding the proposed project. The project is also consistent with the Town of Wappinger Average Density provisions. As such, the proposed project will provide 40.17 acres of open space protected by Conservation Easement, as well as protect all 17.05 acres of on-site wetlands. Furthermore, the Average Density Plan proposes significantly less impervious surface than both the "As - of -Right" subdivision, and the original proposed 94 -lot subdivision. Morris Associates November 9, 2007 E. ldocumr_ n Is I C7nneralV?0C1.512(1_S 1511 _-MCURRENT DEIS FOR BROOK DALE OCT 2.1107WIS NOVEMBER 2007 SUBMISSION, doe Brookvale Subdivision Draft Environmental Impact Slalemenl Page 106 3.5 Geology and Soils Existing Soils and Geolo is Conditions According to the United States Department of Agriculture (USDA) Dutchess County Soil Survey' for this site, six soil types are identified on the project site as illustrated on Figure 3.5-1, "Soil Map." illustrates slope conditions for this site. For the majority of the site approximately 76.79 acres have slopes ranging from zero to 15 percent. Approximately 8.50 acres of the site are comprised of slopes ranging from 15 to 25 percent and approximately 4.21 acres of the site have slopes greater than 25 percent. These steep slope conditions are primarily located within the eastern half of the proposed subdivision. The following offers a detailed description and location of the various soil classifications identified for this site. BeB Bernardston silt loam, 3 to 8 percent slopes — Very deep, gently sloping, well drained loamy soils formed in till. Permeability is moderate in the solum and slow in the dense substratum. Perched high water table..at 1.5 to 2 feet from February to April. THIS SOIL IS PRIME FARMLAND. _. BeC Bernardston silt loam, 8 to 15 percent slopes — Very deep, sloping, well drained loamy soils formed in till. Permeability is moderate in the solum and slow in the dense substratum. Perched high water table at 1.5 to 2 feet from February to April. BOD Bernardston silt loam, 15 to 25 percent slopes — Very deep, strongly sloping, well drained loamy soils formed in till. Permeability is moderate in the solum and slow in the dense substratum. Perched high water table at 1.5 to 2 feet from February to April. Ca Canandaigua silt loam, neutral substratum — Very deep, nearly level, poorly drained and very poorly drained silty soils formed in lake -laid sediments. Permeability is moderate in the surface layer and moderately slow in the subsoil and substratum. High water table at +1 to 1 foot from November to May. THIS SOIL 1S HYDRIC, DwB Dutchess — Cardigan complex, undulating, rocky (1 to 6 percent slopes) — This complex is about 40 percent Dutchess soils, 30 percent Cardigan soils, and 30 percent other soils and rock outcrop. Folded shale rock outcrop covers 0.1 to 2 percent of the surface. ' USDA Natural Resource Conservation Service, Soil snap for Dutchess County, New York. Morris Associates November 9, 2007 F..'IducumenlslGenera112/10.5121J515110,SICURRENT DFLS FOR BROOKV tLE OCT200711)EIS NOVEMBER 2007 SUBAILSSION.doc &rookvale Subdivision Draft Environmental Impact Statement Pate 107 Dutchess soils — Very deep, well drained loamy soils formed in till. Permeability is moderate. Cardigan soils — Moderately deep (20 to 40 inches), well drained loamy soils formed in till underlain by folded shale bedrock. Permeability is moderate. PzB Punsit silt loam, 3 to 8 percent slopes — Very deep, nearly level, somewhat poorly drained loamy soils formed in till. Permeability is moderate in the surface layer and subsoil, and slow in the substratum. Seasonal high water table is at 0.5 to 1,5 feet, from February to April. On or around December 22, 2004, the applicant performed a soil summary on the proposed site. The following is a summary of their findings: "Soils witnessed on-site were generally brown sandy/gravelly soils with silt and some clay deposits. The average topsoil layer was approximately 4 inches and the top 2 feet of the test hole was generally silty with clay. A high water table, approximately 4 to 6 feet, was witnessed in the lower lying areas on the site. Ledge was only located in 2 test holes up on the ridge, at depths of 8.5 feet and 12 feet. There was a hardpan layer up along the ridge at an average depth of 8-9 feet. The rock at this depth was very much like shale in nature". Morris Associates November 9, 2007 F.. - I oonmentsIGen era11200512051511EISICURRFNTDEISFOR RROOKVi1LEOCT20071DF.ISNOVEMBER2007SUBMISSION.doc i z z F Z o Q w Q Lq r LD or, r W 00 NX, t �� ! �w 1 E r / t }; c I • LL '• i °' 1, `' v �"Nf 1� Q w CL r � i �Jl m o r nWP � I �� '�ztii l`� 0 r IV Brookvale Subdivision Draft Environmental Impact Slatemenl Table 3.5-1 On -Site Soil Limitations Page 109 Morris Associates November 9, 2007 E; IdocunentslGeneraII200.512051511EISICURRENT DEI,S FOR BROOKVAI E OCT 20071DF.IS NOVEMBER 2007 SUBMISSION. doe Dwellings Local Roads Septic Tank Permeability High Water Soil Name w/Basements and Streets Absorption Table Fields Bernardston 0-8% - Moderate -6-8,/— 0-15% - Severe, Moderate in the 1.5-2.0 feet Silt Loam Moderate - I Peres Slowly solum and slow (Feb. -Apr.) 8-'15% - Moderate Wetness, Frost in the dense - Wetness, Slope Action substratum 15+% - Severe, 15+% - Severe - 8-15% Peres Slowly, Slope Moderate - Slope Wetness, Slope, Frost Action 151 % - Severe - Slope Canandaigua Severe- Wetness Severe--- Severe- Moderate in the +1-1.0 (Nov. - Silt loam Wetness, 'Frost Wetness, Peres surface layer and May) Pondcd: Severe Action Slowly moderately slow Ponding in the subsoil and Ponded: Ponded: Severe substratum Severe - 1. Ponding, Ponding, frost Peres Slowly Action Dutchess- 0-8% - Slight 0-8%- 0-8%- Moderate >6 feet Cardigan (Dutchess) Moderate Moderate Complex (Dutchess) 8-15%, - Moderate 8-15%- (Dutchess) Moderate 8 -15% - Moderate 151%- Severe 15+%- (Dutchess) (Dutchess) Severe -Slope 15+% -Severe Severe for all (Dutchess) slopes (Cardigan) Severe for all slopes (Cardigan) Punsit Silt Severe- Wetness Severe- Severe- Moderate in the 0.5-1.5 feet Loam Wetness, Frost Wetness, Peres surface layer and (Feb. -Apr.) Action Slowly subsoil, and slow in the substratum Morris Associates November 9, 2007 E; IdocunentslGeneraII200.512051511EISICURRENT DEI,S FOR BROOKVAI E OCT 20071DF.IS NOVEMBER 2007 SUBMISSION. doe Brookvale Subdivision Draft Environmental Impact Statement Page 110 i s Blasting/Blasting Mitigation It is anticipated that the majority of rock removal on the site may be achieved through mechanical means (i.e., hydraulic hammers), where feasible. See Appendix 6.14 for the Potential Blasting Areas Map. However, the proposed location for the utility lines will encounter rock in some locations and some minor blasting may be required. This is further discussed in Section 2.3 "Construction". If blasting is required, all operations will adhere to New York State ordinances governing the use of explosives. Proper program guidelines will be established between the State, the Town, and the blasting contractor prior to undertaking this activity. In addition to obtaining applicable blasting certifications and complying with all blast safety requirements a blast -monitoring program will be implemented. The elements of such a program include, but are not limited to the following: ■ Precise engineering determination of the depth and location of on-site blasting. ■ Evaluation of the location of property lines and the structural nature of nearby buildings for determination of the maximum blast velocity for charges to be used. ■ Use of a seismograph to monitor each blast attempt and evaluate the blast velocity of the charges used. ■ Use of blast matting as may be necessary to minimize lifting of rock and debris during blasting. ■ All pertinent safety regulations and standards shall be applied as required for safety, security and other related details for any blasting deemed necessary. Applicable safety regulations are: • ACOE Safety Manual EM 385-1-1 • Code of Federal Regulations A.T.F. Title 27 • Institute of Makers of Explosives Safety Library Publications No. 22 Storage of all explosive materials shall be located on the site at a location approved by the blasting engineer. Caps or other detonating devices will not be stored with Class A explosives. Design of the powder magazine shall be in accordance with the references above. The security for explosives and blasting materials stored on-site will be in accordance with engineer -approved requirements. ■ Delivery and transportation of explosives from the powder magazines to the blast area will be by vehicles specifically designed for this use by the criteria Morris Associates November9, 2007 F: I documents I Gen eralY2005120515AFISICURRF.NT DEIS FOR RROOKVALF. OCT 20071DEIS NOVEMBER 2007 SUBMIS.S1ON.doc Brookvale ,Subdivision Draft Environmental Impact Statement Page III outlined in the safety requirements. Only authorized persons will transport and handle the explosives as designated by the authority of those licensed for this purpose. At all times federal, state, and local ordinances will be followed concerning the transportation and storage of explosives. The designated storage site, explosive transporting vehicles, and areas where explosives are being used shall be clearly marked and shall display the required warning signs. A daily tally of all explosives delivered, used and stored shall be maintained. ■ Prior to blasting, the necessary precautions for the protection of persons, adjoining property, and completed work shall be established, including: • Appropriate signs shall be erected in the area of blasting activities. A storm alert monitoring device shall be used by the blasting Contractor to detect any electrical build-up in the atmosphere at the blast area while using electrical caps. • Special care shall be taken with detonating cords and connectors to protect from the impact of falling rocks or other impeding objects. • Vehicles equipped with radio transmitters and portable 2 -way radios will not be permitted within 250 feet of blasting operations. Potential Soils and Geologic Impacts Construction of the proposed subdivision will disturb 6 soil types, and disturb a total of 40.45 acres (See Appendix 6.20, "Limits of Disturbance"). The locations of these soils within the site parcels are illustrated on Figure 3.5-1. See "Grading and Utility Plan" in Appendix 6.92 for an illustration of the grading plan for the project site. The largest single soil type that will be disturbed is the Bernardston Silt Loam, 8 to 15 % slopes (BeC). Table 3.5-2 on the following page lists the amount of each soil type that is to be disturbed on the site. Morris Associates November A 2007 E.`IdocumentsiGeneaII2(10512051511 F'IS1 CURRENT DFkS FOR BROOK FAI_F 0C7'20117!DELS 1ttOVEilBr)Z 2007 ,SC BMI,S,410N.Anc Brookvale Subdivision Draft En vironmental hnpact Statement SOIL TYPES TO BE IMPACTED SOIL TYPE ACRES DISTURBED Ca 1.03 Dw6 6.56 PzB 5.6 Be D 2.04 BeB 2.96 BeC 22.26 Table 3.5-2 Soil Types to Be Impacted 112 The majority of the soil disturbance will be associated with the construction of the residential dwellings and roads. Disturbance associated with construction of the project will consist of the following: ■ Disturbance to soils and geology, primarily due to the construction of roads, stormwater control structures, and the excavation of house foundations. ■ Removal and stockpiling of topsoil. ■ Erosion and the resulting sedimentation within storm runoff. ■ Construction within wet or poorly drained soils resulting in reduced bearing capacity of the soil. Construction of the proposed subdivision will attempt to avoid construction in areas with shallow depth to bedrock. According to the Deep Test Log, the shallowest depth to bedrock encountered was 8.5 from existing grade (See Appendix 6.11). A small area in the vicinity of proposed lots 2-6, along the easterly most boundary of the site could potentially require blasting (See Appendix 6.14). See table 3.5-3 below for the anticipated cut/fill volumes for the proposed subdivision. EARTHWORK VOLUME TABLE PHASE CUT (cu. FILL (cu. NET (cu. Yds.) Yds.) Yds.) METHOD OF CALCULATION ENTIRE SITE 135,000 131,000 4,000 PAYDIRT MODEL Table 3.5-3 Anticipated Earthwork Volumes Morris Associates November 9, 2007 E: I documr:nts I Cer7ei alY2011512051511FISlCtIRRF,N7'DFIS FOR BROOKVALE OCT 20071PEIS N0P'FA4BER 2007 SUBMISSION.doc Brookvale Subdivision Drgli Environmental Impact Statement Page 113 Mitigation Soils and Geologic Measures The greatest mitigation measure to soils and geology is in the overall design of the Average Density layout when compared with other residential alternatives considered (including the original 94 -lot layout), which will decrease the disturbance to soils and geology due to the construction of roads and stormwater control structures. Also, the phasing of the project will allow for the roadway and stormwater collection system to be in place prior to lot construction. This will help limit erosion potential. Slopes for all developed areas will generally not exceed five percent, with side slopes not exceeding three horizontal to one vertical. Slopes on the internal roads will not exceed the Town requirement of no greater than ten percent. Agricultural Soils Through creative design iterations, the Average Density layout was chosen to conserve the maximum amount of agricultural soils on the site. Those soils, which provide optimum agricultural usage unfortunately, are largely those that are preferred for onsite development. Often, it is neither possible nor practical to site roads and houses in a manner to preserve these agricultural areas. Of the approximately 23.46 acres of agricultural soils on the project site, 3.82 acres will be converted. No additional mitigation measures are proposed. Sediment and Erosion Control Plans and Discussion of Management Practices Impacts to soils and geology will be minimized through erosion control measures and the establishment of Management Practices. As outlined in the March 10, 2003, "Phase II Stormwater Regulations," the Applicant is proposing to implement the following erosion control measures: 1. Establish a construction phasing plan describing the intended sequence and schedule of construction activities, including clearing, grubbing, excavation and grading, utility and infrastructure installation and any other activity to reduce on-site erosion and off-site sedimentation by performing land -disturbing activities and installing erosion control practices in accordance with a planned schedule. 2. There shall not be more than five (5) acres of disturbed soil at any one (1) time without prior written approval from the NYSDEC. 3. Protect existing vegetation - Areas where vegetation preservation occurs will be shown on the grading plans and instructions presented as to construction procedures to be followed in and around these sensitive areas. These measures will include: Morris Associates November 9, 2007 E: IdocumentsIGenerah20051205l5lIEISicuRRF,N7" DEIS FOR BROOKVALE OCT 20071DEIS NOVEMBER 2007 SUBMISSION.doc Brockvale Subdivision Draft Lm4ronmentallmpacl Siatepnenl Page 114 • Placement of safety fence along the perimeter of protected zones Routine inspection schedule for compliance • Remedial measure for repair and maintenance. 4. The mitigation proposed for the removal and stockpiling of topsoil is the placement and protection of this soil in locations to ensure the ability for the reclamation of the topsoil upon the graded areas of the site. This can be achieved by the following: Locate topsoil in areas that do not receive direct runoff from swales or streams. The topsoil shall be protected with diversion swales if necessary. Locate topsoil areas beyond proposed grading activities for roadways and driveways. Enclose topsoil areas with silt fencing to minimize erosion potential. Seed topsoil to reduce erosion if stored for prolonged periods Stabilization measures will be employed as soon as practicable in portions of the site where construction activities have temporarily or permanently ceased, but in no case longer than 14 days after the construction activity in that portion of the site has temporarily or permanently ceased. On a weekly basis and within 24 hours following each rainfall event of 0.5° or greater, the contractor will inspect all erosion control measures employed during construction activities to measure proper performance, 1 5. In areas where construction will take place in "wet soils," curtain drains or subsurface drainage will be installed as needed to drain the soils. 6. Disturbed areas are to be conveyed to sediment traps. 7. During construction, as the road sub -grade is formed by fill, work will proceed quickly and the side slopes will be seeded with a quick germinating rye (10 to 15 pounds per 1000 square feet). Concomitantly, any gullies or washes that develop will be filled and the surface graded to prevent wash in the same locations. S. To direct runoff away from excavated areas, temporary drainage swales will be installed with a minimum grade of one percent where feasible. A permanent vegetative covering is required where the channel grade is between 0.2 percent and three percent. Location of the drainage swales will be at the direction of the Project Engineer or as supplemented by the Town Engineer. New York Standards and Specifications for Erosion and Sediment Control, Empire State Chapter Sail and Water Conservation Society, 2003. Morris Associates November 9, 2007 E.•I documents) GeneraA20051205151; EISICURRENT DEIS FOR BROOKVALE OCT 20071 DEIS NOVEMBER 2007 SUBMISSION.doc Brookvale. Subdivision Draft FnvironmentalImpact Statement Page 115 ' 9. Reverse slope benches of diversion swales will be provided wherever the vertical height of any 2:1 slope exceeds 20 feet; 30 feet for slopes of 3:1; and 40 feet for slopes of 4:1. Benches or swales will be located to divide the slope face into equal sections to convey runoff to stable outlets. Benches will be a minimum of six feet wide to provide for maintenance. Benches will be designed with a reverse slope of not more than 6:1. Bench gradient to the outlet will be between two and three percent. The flow length of any bench or Swale will not exceed 800 feet. Develop surface roughening practice based on site conditions and equipment availability. 10. No more than five acres of soil shall be exposed at one time without prior written approval from the NYSDEC. Therefore, phasing of construction activities should be considered. Should the construction process expose a significant soil area for any length of time, increased potential for erosion and dust creation could occur. The contractor will provide, at the Town Engineer and/or Project Engineer's direction, supplemental surface treatments (i.e., temporary swales and/or rip -rap intercept pools, and appropriate dust control measures) as may be required. Post -Construction After construction, erosion control measures will be consistent with the recommendations in the New York Guidelines for Urban Erosion and Sediment Control. These measures will be carried out by the Town of Wappinger for facilities with the Town's rights-of-way, which include the following: ■ Annual inspections of the stormwater collection system to ensure proper operation. ■ All catch basin sumps will be cleaned when they reach 50% capacity. ■ All riprap at outfalls will be either cleaned or replaced when it becomes overburdened with silt or sediment. ■ All drainage areas damaged by erosion will be repaired. ■ All silt or sediment accumulations will be cleaned from stormwater quality management basins. ■ All drainage swales will be kept free of debris and the vegetation should be maintained to allow unobstructed flow of stormwater. ■ Any slopes or embankments that have damaged vegetation will be re -seeded as necessary. Netn York Standards and Specifications for Erosion and Sediment Control, Empire State Chapter Soil and Water Conservation Society, 2003, Morris Associates November 9, 2007 E. I docwnenls 1GeneralV 20l151Z115L5I I FISICURRENT DFIS FOR RROOA'K4LE OCT 2007DF.IS NOVFMBER 2007 SUHAILVIONdoc Brookvale Subdivision Draft Envirownental llmpact Statement Page 116 ■ All grass swale areas will be mowed so that they facilitate an unobstructed flow of stormwater. 3.6 Topography and Steep Slopes Existing Topography and Steep Slope Conditions As previously mentioned in Section 3.5, for the majority of the site approximately 76.79 acres have slopes ranging from zero to 15 percent. Approximately 8.50 acres of the site are comprised of slopes ranging from 15 to 25 percent and approximately 4.21 acres of the site have slopes greater than 25 percent. These steep slope conditions are primarily located within the eastern half of the proposed subdivision. See Figure 3.6-1 for the existing Slope Analysis Map. Proposed Impacts to Topography and Steer) Slope Conditions The proposed Brookvale Subdivision will create 54 single-family homes. This will result in changes in the existing topography of the site due to both lot and road grading. Of the 40.45 acres that are to experience disturbance during construction, 33.13 acres contain existing grades ranging from between 0-15%, 5.46 acres contain grades ranging from 15-25%, and 1.86 acres contain existing grades greater than 25%. See Figure 3.6-1, "Slope Analysis Map" to see the existing slope conditions within the proposed limits of disturbance. The proposed road grading will create changes in slopes ranging from 1.5-9%. This proposed road grading is designed to maintain as much as possible the existing topographic conditions of the site. The proposed lot grading is designed with several objectives in mind. The grading has been designed to direct stormwater runoff to the proposed drainage structures and measures, and to minimize the limits of disturbance for development, which will maintain as much as possible the existing topographic conditions of the site. The maximum proposed slope for off-road grading does not exceed 3:1. Miti ation Measures for ToPography and Steep Slope Conditions Mitigation for the road grading comes from the maintaining of existing topographic conditions of the site, minimizing the amount of cutting and filling in the establishment of the proposed road. Mitigation for the lot grading comes from the minimization of grading area. This involves grading in order to maintain the maximum amount of existing natural resources. Morris Associates November 9, 2007 F.. idnctrmenlslCenern117.80512051511FISICURRENTDELFOR BROOK!/ALEOCT20WIDEIS N0!/EA4RF.R2007SUBMISSI0Nr,, Broakvale Subdivision Drafl Environmental Impact Stalement Page 117 Additionally, mitigation comes from the Average Density plan itself. When compared with the Conventional Subdivision or the original 94 -lot subdivision, the Average Density plan proposes the least amount of disturbance to existing site conditions. Morris Associates November 9, 2007 Ii. lrinriimenlsl Genera112!}O.i12051.51 VS)CURRFNT DFE FOR BROOKVAI,F OCT 2007iDEIS NOVEMBER 2007 SUBAIISSION.doc IN Brookvale Subdi;,won Draft Environmenial impact Statement Pgge 119 3.7 Vegetation and Wildlife Existing Vegetative Communities The DEIS for the prior approved 94 lot proposal (See Appendix 6.2) contained the following narrative regarding Vegetation and Wildlife Habitats (in italics): "The project site was used for agriculture in the past, but now the vegetation consists almost entirely of mid -succession woodland. There are two small stands of white pine and hemlock on the western side of the ridge and a few small areas of receding old fields. Lists of plants, which were observed and are characteristically found in this type of woodland, are presented herein. During site visits, few species of wildlife were observed and only limited evidence of their presence was found. The presence of wildlife can be inferred from the available habitat due to its limited diversity. The wildlife species expected on this site are common in southern New York. Rare or endangered plant or animal species were not observed during the recent site inspections. The NYS DEC Significant Habitat Unit was contacted and no record of rare or endangered species on the site was found." Michael Nowicki of Ecological Solutions, LLC conducted flora and fauna surveys to identify species that are present on the subject property and to evaluate the potential impacts of the project development on these species and communities. The ability of the site to support endangered and threatened species was atso evaluated. Vegetative surveys on the property involved direct field identification of species that could be visually observed and identified during the spring and summer of 2005 and 2006. Vegetation was identified by flower type and floral structure, by type, and leaf shape and arrangement and in both flowering and non -flowering conditions. Individual specimens were identified by common name and scientific name (genus and species), and recorded. Unless noted, the Flora list contains species that were observed to be present on the site. The New York State Department of Environmental Conservation's (NYSDEC) publication "New York State Endangered, Threatened and Special Concern Species 1998," was used as the definitive list for determining whether any plants observed in the study area would be considered Endangered or Threatened. The vegetation inventory positively identified 44 Flora species on the site. These are outlined in the Natural Resources Survey in Appendix 6.11. Ecological Solutions, who produced the Natural Resources Survey observed no rare, threatened, or endangered plant species on the site during extensive evaluations. There are three (3) distinct cover types identified on the site as classified by the NYSDEC. These cover types and acreages of each are shown in Table 3.7-1 and Table 3.7-2. Morris Associates November CirlacrunenrslC,eraeralV.i)C).5121t_51511LI.SYCL(RRCAfTl)fISFOR BRf)fiKV41FOCI'7t10711JFf.SNOVI,111REP7007St1 9lSSION doe Brookvale Subdivision Draft Environmental Impact Statement Table 3.7-1 Cover Types Identified on the Brookvale Property I QUI /ALENT CO1✓ER tYR[= NAAnFO 1 Rich Mesophytic Forest/28 acres 2 Successional Northern Hardwoods/51.5 acres 3 Red Maple Hardwood Swamp/10 acres krr. Sugar Maple, Red Oak, Black Oak Eastern Red Cedar, Black Birch Red Maple, American Elm Table 3.7-2 Cover Type Impacts Brookvale Property NO. RESCHKE, 1990 Acres' Acres Identified on Impacted on Property Property Rich Mesophytic Forest/28 acres 28 21.48 2 - Successional Northern Hardwoods/51.5:a res 51.5 31.9 3 Red Maple Hardwood Swamp/10 acres 10 0 Total 89.5 53,38 The existing vegetation on the site contains some hard and soft mast or food types for a variety of wildlife utilizing the site. Berries, acorns, and nuts provide a substantial amount of food material to resident and migratory wildlife and can be found with a quick walk through the property. The deciduous forest community that is present occurs on relatively well -drained soils and is a typical oak --tulip forest type. This community type is classified as a Mature Mesophytic Lowland Forest (mesophytic hardwood forest) that occurs on moist, well - drained soils. Dominant tree species observed include: Red Oak (Quercus rubra), Black Oak (Quercus velutina), Tulip Tree (Liriodendron tulipifera), white ash (Fraxinus americana), Shagbark Hickory (Carya ovata), American Beech (Fagus grandifolia), and Black Birch (Betula lenta). Understory trees consisted of smaller individuals of the dominant trees. The shrub layer consists primarily of Witch -Hazel (Hamamelis virginiana), Mulitflora Rose (Rosa multiflora), Poison Ivy (Rhus radicans) and Wild Grape (Vitis spp.). Common groundlayer species observed include Christmas Fern (Polystichum acrostichoides), Garlic Mustard (Alliaria petiolate), Virginia creeper (Parthenocissus quinquefolia), and Wood Fern (Dryopteris spinuiosa). Young pioneer forest also exists on the property in previously cleared and farmed areas. This stage of forest development is classified as mesophytic hardwood forest (young woods) that occurs on moist, well -drained soils. Age classes of forested landscapes on the site range from young growth to mixed age, second growth to climax Morris ,lssociates November 9, 2007 FldocumentslCeaeroli2fl(,517051511FISICUIiRFNTDFI,SFORBROOKIIALEOCT20071DFl5NOVFAIRER2007SUPAJISSION, oc