EAF part 3 DEC/Chelsea
EAF PART 3 NARRATIVE
NYCDEP Water Main Extension, Phase 1 and Phase 2
Town of Wappinger, Dutchess County
MA#W21215.01
Part 3 of the EAF has been completed for those questions in Part 2 of the Full
Environmental Assessment Form for which responses were answered affirmatively, with
all impacts identified in Part 2 having been identified as being not environmentally
significant.
1. WILL THE PROPOSED ACTION RESULT IN A PHYSICAL CHANGE TO THE
PROJECT SIZE?
a.) Any Construction On Slopes Of 15% Or Greater, (15 Foot Rise Per 100
Foot Or Lenqth), Or Where The General Slopes In The Proiect Area
Exceed 10%.
This question was answer~d affirmatively as a small to moderate impact.
Approximately 8% of the proposed water main will be installed in areas
with slopes of 15% or greater. At these slopes there is a greater potential
for soil erosion.
A stringent plan for soil erosion and sediment control shall be part of the
design of the project and shall be implemented during the construction
phase in areas which have been identified as having a potential of being
impacted by soil erosion and sedimentation to minimize any potential
impacts.
The soil erosion and sediment plans shall be established in accordance
with all State and local guidelines/specifications.
The plan will include, but is not limited to the following control techniques:
1. Sediment traps, filter inlets, or straw bales will be used to reduce
sedimentation onto adjacent lands. Berms and barriers may also be used
to reduce this potential impact.
2. Runoff from steeper slopes will be controlled and channeled using
retaining walls, diversion swales, or dry wells.
b.) Construction On Land Where The Depth To The Water Table Is Less Than
3 Feet.
This question was answered affirmatively as a small to moderate impact.
The construction of the water main connection will require the water main
to be installed at a depth of 5'. At this depth, there is the potential for
encountering water during excavation.
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Trench dewatering may be required if groundwater is encountered during
construction. Discharges from dewatering pumps will be directed to
sediment traps located in upland areas outside of wetland buffers.
Spreaders will be used to encourage sheet flow from the discharge hose.
Direct discharge to water bodies will not be permitted.
c.) Construction on Land Where Bedrock is Exposed or Generally Within 3
Feet of Existinq Ground Surface.
This question was answered affirmatively as a small to moderate impact.
The construction of the water main connection will require the water main
to be installed at a depth of 5'. At this depth, there is the potential for
encountering rock during excavation.
Where possible, alternatives to blasting will be utilized, including removal
by mechanical means. Blasting will not be permitted in environmentally
sensitive areas. If blasting is necessary, all blasting operations shall
conform to all Federal, State and local requirements, including: The Code
of the Town of Wappinger, Chapter 80, Blasting; and the requirements of
Industrial Code Rule 39 of the State of New York, which provides for the
handling, storage and transportation of all explosives used at the site. Any
required blasting operations shall be required to insure protection of any
nearby existing structures, including the requirement for conducting
seismic surveys prior to any blasting activities.
d.) Construction In A Desiqnated Floodway.
This question was answered affirmatively as a small to moderate impact.
Approximately 2,650 feet of the proposed water main will be installed in
areas inundated by a 1 DO-year flood. Approximately 150 feet of the
proposed water main will be installed in a designated f1oodway.
Water main within f100dways and areas subject to 1 DO-year floods and
wetlands will be constructed utilizing direction drilling technologies to
minimize or eliminate disturbance or changes to the existing ground surface.
Installation will be done in compliance with the Code of The town of
Wappinger, Chapter 133 Flood Damage Prevention.
3. WILL PROPOSED ACTION AFFECT ANY WATER BODY DESIGNATED AS
PROTECTED?
a.) Developable Area Of Site Contains A Protected Water Body.
This question was answered affirmatively as a small to moderate impact.
The proposed water main will be installed through a portion of NYSDEC
wetland WF-27 and its associated buffer zone.
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Water main within designated wetland and buffer areas will be constructed
utilizing direction drilling technologies to minimize or eliminate disturbance
or changes to the existing ground surface. Installation will be done in
accordance with any pertinent local or state regulations.
b.) Extension of utilitv distribution facilities throuqh a protected water body.
This question was answered affirmatively as a small to moderate impact.
The proposed water main will be installed through a portion of NYSDEC
wetland WF-27 and its associated buffer zone.
Water main within designated wetland and buffer areas will be constructed
utilizing direction drilling technologies to minimize or eliminate disturbance
or changes to the existing ground surface
c.) Construction in a desiqnated freshwater or tidal wetland.
This question was answered affirmatively as a small to moderate impact.
The proposed water main will be installed through a portion of NYSDEC
wetland WF-27 and its associated buffer zone.
Water main within designated wetland and buffer areas will be constructed
utilizing direction drilling technologies to minimize or eliminate disturbance
or changes to the existing ground surface
6. WILL PROPOSED ACTION ALTER DRAINAGE FLOW PATTERNS. OR
SURFACE WATER RUNOFF?
a.) Proposed Action Mav Cause Substantial Erosion.
This question was answered affirmatively as a small to moderate impact.
There will be some potential impacts associated with the occurrence of
runoff and erosion during construction activities.
A stringent plan for soil erosion and sediment control shall be part of the
design of the project and shall be implemented during the construction
phase in areas which have been identified as having a potential of being
impacted by soil erosion and sedimentation to minimize any potential
impacts.
The soil erosion and sediment plans shall be established in accordance
with all State and local guidelines/specifications.
The plan will include, but is not limited to the following control techniques:
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1. Sediment traps, filter inlets, or straw bales will be used to reduce
sedimentation onto adjacent lands. Berms and barriers may also
be used to reduce this potential impact.
2. Runoff from steeper slopes will be controlled and channeled using
retaining walls, diversion swales, or dry wells.
7. WILL PROPOSED ACTION AFFECT AIR QUALITY?
a.) Other Impacts - Dust Durinq Construction.
This question was answered affirmatively as a small to moderate impact.
Dust particles are expected to increase in the construction areas disturbed
during the water main installation. To minimize this temporary condition,
dust control measures as recommended by the Dutchess County Soil and
Water Conservation District Guidebook will be implemented during
construction. Additionally, the work area will be sprayed with water to
minimize the blowing of the dust off-site, when necessary.
8. WILL PROPOSED ACTION ANY THREATENED OR ENDANGERED
SPECIES?
a.) Other Impacts - Construction In Area Of A Documented Bald Eaqle Nest.
This question was answered affirmatively as a small to moderate impact.
During the environmental reviews of this project it was determined that
there is a known bald eagle nest in the vicinity of the Wheeler Hill Road
and River Road areas of the project ("Wetland and Threatened and
Endangered Species Habitat Suitability Assessment - NYCDEP Water
Main Extension Phase 1 and Phase 2 Town of Wappinger, Dutchess
County", Ecological Solutions, LLC, 8/1/12). In accordance with the
National Bald Eagle Management Guidelines blasting will be prohibited
with one-half mile active nests during the breeding season (December 1 to
September 1).
12. WILL PROPOSED ACTION IMPACT ANY SITE OR STRUCTURE OF
HISTORIC, PRE-HISTORIC OR PALEONTOLOGICAL IMPORTANCE?
a.) Proposed Action Occurrinq Whollv Or Partiallv Within Or Substantiallv
Contiquous To Anv Facilitv Or Site Listed On The State Or National
Reqister Of Historic Places.
This question was answered affirmatively as a small to moderate impact.
An archeological report indicates that the areas of the project along
Wheeler Hill Road and in Carnwath Park will be within or adjacent to the
Wheeler Hill Historic District ("NYCDEP Waterline Extension Phase 1 A
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Literature Review and Sensitivity Analysis & Phase 1 B Archaeological
Field Reconnaissance Survey", CITY/SCAPE: Cultural Resource
Consultants, September 2012). This report indicates that no significant
cultural resources were detected along the proposed Phase 1 water main
route, including Carnwath Park.
In addition, the project area along Spring Street in the Hamlet of Chelsea
contains the Chelsea Grammar School and St. Mark's Episcopal Church.
All three locations are listed on the National Register of Historic Places.
The proposed water main installation will not adversely impact the
structures listed on the National Register of Historic Places since
construction will occur within or immediately adjacent to the road right-of-
ways.
15. WILL THERE BE AN EFFECT TO EXISTING TRANSPORTATION SYSTEMS?
a.) Other Impacts - Short Term. Secondary Traffic Impacts Durina
Construction
This question was answered affirmatively as a small to moderate impact.
The proposed water main connection will be installed along both Town
and County roads. It is anticipated that only minor traffic issues will occur
during construction activities associated with the installation of the new
water main connection. Most of the new pipeline will be installed just
outside of the roadway.
17. WILL THERE BE OBJECTIONABLE ODORS. NOISE. OR VIBRATION AS A
RESULT OF THE PROPOSED ACTION?
a.) Other impacts: Temporary noise impacts will occur durina construction.
This question was answered affirmatively as a small to moderate impact.
Short term noise impacts are expected from the construction activity.
General construction activity shall be limited to normal daytime working
hours of 7 a.m. to 7 p.m.
18. WILL PROPOSED ACTION AFFECT PUBLIC HEALTH AND SAFETY?
a.) Other Impacts - Potable Water Supplv
This question was answered affirmatively as a small to moderate impact.
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Installation of the proposed water main extension and appurtenances from
the United Wappinger Water District to the New York City Department of
Environmental Protection Shaft 6 site, and ultimately to the residents of
the Hamlet of Chelsea, is considered a beneficial impact since it will allow
the NYCDEP to make improvements to their water system and it will
provide potable water to residents of the project area.
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