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PAGGI & MARTIN
Consulting Engineers & Land Surveyors
r>>L/
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54-56 Main Street
Poughkeepsie, New York 12601
914-471-7898
914-471-0905 (F^JC)
November 3, 1997
New York State Department of Health
Bureau of Public Water Supply Protection
2 University Place, Room 410
Albany, New York 12203
Reference:
Michael E. Burke, P.E., Director
Wappinger Four District
Attention:
Dear Mr. Burke:
This letter is a formal request that the project known as "Wappinger Four
District" be listed on the next Drinking Water State Revolving Fund
Intended Use Plan.
"Wappinger Four District" is a large sub-area of "Wappinger Park
Homes", which can be found in the October 1997 -March 1998 Draft
Intended Use Plan Multi Year List, with a score of 155. It is the Town of
Wappinger's intent to break "Wappinger Park Homes" into three (3)
smaller projects, one of which being "Wappinger Four District", and have
each listed on the next Intended Use Plan.
Included herewith is the pre-application form, project description, and
cost estimate for "Wappinger Four District. Pre-applications for the other
two projects referred to above will arrive under separate cover.
If you have any questions regarding this letter, please do not hesitate to
contact this office.
Very truly yours,
j t WJ-
Joseph W. Grogan
Junior Design Engineer
JWG:law
Enclosure
cc: Hon. Constance O. Smith, Supervisor wlo enclosure
Hon. June Visconti, Councilperson wlo enclosure
Hon. Vincent Bettina, Councilperson wlo enclosure
Hon. Joseph Ruggiero, COLlncilperson wlo enclosure
Hon. Robert Valdati, Councilperson wlo enclosure
Elaine Snowden w/enclosure
Albert P. Roberts, Esq. w/o enclosure
Joseph E. Paggi, Jr" P.E.
Ernst Martin, J r., P.E., L.S.
@ p"nted on ,ecvcled pape,
10/22/97 14:04 F.U 5184586420 \YSDOH DESIG\ @002
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PAGGI&MARTIN
Consulting Engineers & Land Surveyors
54-56 Main Street
Poughkeepsie, New York 12601
914-471-7898
914-471-0905(FPUQ
November 3, 1997
New York State Department of Health
Bureau of Public Water Supply Protection
2 University Place, Room 410
Albany, New York 12203
Attention:
Reference:
Michael E. Burke, P .E., Director
Wappinger Four District/Project DescriptiOi i
Dear Mr. Burke:
The intent of this project is to consolidate four (4) of the existing water
systems in the Town of Wappinger and incorporate them with a major
new source of supply (ie: the Atlas Wellfield). It will also rehabilitate
existing system components and provide major new infrastructure
improvements. The resulting new service area would then be capable of
providing safe, stable source, treatment, delivery and storage capacity.
The existing water systems to be consolidated under this Proposal are
summarized as follows:
Ardmore Hills Water Improvement Area
North Wappinger Water Improvement (NWW)
- Atlas Waterworks
Myers Corners II Water District
Cranberry Hills Water Improvement Area
Also included under this proposal are the Meadowood and Cedar
Ridge Subdivisions.
The existing satellite water systems not to be consolidated under this
Proposal are summarized as follows:
Oakwood Water District
Fleetwood Water District
Wappinger Park Water District
The proposed improvements, however, have been designed to
accommodate these districts when and if it is determined to include any
or all in the new Improvement Area.
o
Central Wappinger Water Improvement (CWW)
- Hilltop Waterworks
- Rockingham Waterworks
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Joseph E. Paggi, Jr., P.E.
Ernst Martin, Jr., P.E., L.S.
@ printed on ,eeycled paper
Michael E. Burke
RE: Wappinger Four District
- 2 -
November 3, 1997
The existing water systems in the Town of Wappinger (including those
under this proposal), have a long, documented history of inadequate and
unreliable source capacity which have culminated in numerous instances
of Town of Wappinger declared emergency drought conditions. There are
also numerous instances of inadequacies and/or code violations with
regard to existing system distribution mains, water quality, and storage
facilities.
As such, the project can be viewed as a mitigation of numerous existing
inadequacies and public hazards which when complete, will deliver
potable water service to approximately 65% of the Town of Wappinger in
compliance with applicable Federal, State and Local health standards, and
prevent future violations of standards.
The project will also allow for the safe and environmentally sound
development of numerous large parcels of residential land currently slated
for development, but which are lacking in potable water service
capabilities.
The existing water systems in the Town of Wappinger including those
under this proposal), have a long and documented history of inadequate
and unreliable source capacity. They are also burdened by distribution
main inadequacies, undersized storage facilities, and instances of water
quality degradation. User, supply and demand data for the fuur (4)
existing satellite districts under this proposal, as well as problem
areas/required capital improvements, are summarized in Table 1 herein.
SOURCE:
Both the Hilltop and Rockingham wellfields in the Central Wappinger
Water Improvement Area (CWW) have historically experienced reduced
well output during times of drought emergency. The magnitude of the
drop in well production during such times has been severe enough to
cause the Town to institute Emergency Water Usage Bans.
The satellite districts not included under this proposal (Fleetwood,
Oakwood, Wappinger Park) have historically experienced severe water
quality and supply problems. It is a long term goal of this proposal to
eventually include these districts in a Town wide system, and the project
has been designed accordingly.
Such instances of inadequate, unstable production levels, as well as the
documented water quality problems lead the Wappinger Town Board to
investigate new sources of supply. To that end, in July of 1991, the
Town purchased the former Atlas Waterworks, and authorized the
establishment of the North Wappinger Water Improvement.
Michael E. Burke
RE: Wappinger Four District
- 3 -
November 3, 1997
In 1996, the Town retained the firm of Leggette, Brashears & Graham
(LBG) to perform a hydrogeologic analysis utilizing a "basin wide"
approach for the Atlas wellfield. The study concluded that the safe yield
of the wellfield property is approximately 2.26 million gallons per day
(mgd). This figure is well above the current usage of the wellfield
(0.19:t mgd), and slightly higher than the current approved taking rate
(2.16:t mgd). The report also notes that, as per Mr. Joseph Marcogliese
of the New York State Department of Environmental Conservation
(NYSDEC), at the present time there is no ground water withdrawal limit
for this section of the Wappinger Creek Drainage Basin.
In order to achieve the greater pumping rates required to utilize the Atlas
wellfield to its full potential, LBG recommends the installation of existing
production wells. Although redevelopment of the existing wells is an
option to increase the output, LBG cautioned that the benefits of such a
course of action could be short lived. Instead, they recommend
increasing the number of production wells to decrease the stress on
individual wells and increase future total pumpage levels. It is likely that
four to five additional wells will be required to produce up to the safe
yield of the property. To this end, LBG is currently engaged in a Phase II
drilling program to confirm locations suitable for development of high
yielding wells. The results of said program are still pending.
DISTRIBUTION:
While the existing distribution mains are sufficient to serve water users in
the existing systems, an additional 4,200 feet of distribution main is
proposed along a currently unserved section of Myers Corners Road
which will effectively complete a service loop, thereby providing a degree
of redundancy to the system.
Also included under this proposal are the Meadowood and Cedar Ridge
subdivisions, two large parcels of residential land currently slated for
development. It should be noted that these developments will be
responsible for installing all their own internal distribution mains.
Additionally, the project will require that a dedicated transmission main be
constructed from the new source (ie: Atlas Wellfield) directly to the
proposed 4 million gallon storage tank (i.e.: Cider Mill Loop Tank). This
line will be used solely to fill the tank, with no interim service connections
being allowed.
Michael E. Burke
RE: Wappinger Four District
- 4 -
November 3, 1997
TREATMENT:
The use of the Atlas Wellfield to such an extent as proposed will require
the installation of iron and manganese removal facilities. The need for
water treatment at the Atlas Wellfield stems from residential complaints
of turbid, and discolored water supply. These problems have apparently
persisted for a number of years. Information from the system operators
indicates that slightly elevated levels of iron and manganese present in
the source may, when oxidized, form a dark precipitate thus discoloring
the supply. This condition is aggravated by a lack of flushing hydrants on
the distribution line, and occasionally unusual pump cycling during times
of heavy demand.
Elevated levels of iron and manganese are historically associated with
discoloration, taste and odor problems, and staining of laundry and
fixtures.
Hardness standards for potable water generally are as follows:
HARDNESS (IN PPM) (DEGREES OF HARDNESS
o - 35 SOFT
36 - 100 MEDIUM
100 - 150 HARD
OVER 150 EXTREMELY HARD
The source supply from the Atlas Wellfield has an average hardness of
approximately 235 ppm (extremely hard). Hard water is historically
associated with difficulty in getting soap to lather, soap rings on fixtures,
and scaling of piping, heaters and boilers.
In general, water treatment will be accomplished as follows:
Iron and manganese removal shall be accomplished by means of
adequately sized filtration units rated at 100 psi working pressure. Said
filters shall be equipped with all necessary internal piping, valving, filter
media beds, chemical feed system, pressure gauges and sample taps.
Water softening shall be accomplished by means of adequately sized
units rated at 100 psi working pressure. Said softeners shall be equipped
with all necessary internal piping, valving, ion exchange resin, brine
regeneration equipment, ejector, switches and ball valves. The softeners
would treat a portion of the incoming flow, with the remainder of the
flow being bypassed. The resulting blended water would result in a
finished hardness of acceptable level.
Michael E. Burke
RE: Wappinger Four District
- 5 -
November 3, 1997
The water treatment system shall be equipped with all necessary flow
indicators, blending controls, and electric control panel for fully automatic
operation.
CHLORINE DETENTION
There are no existing facilities at the Hilltop, Rockingham or Atlas
Waterworks Systems that can provide substantial chlorine detention time.
To comply with all applicable State and Local Health Codes, it shall be
required that adequate detention facilities be provided to give full
disinfection at peak flow periods. The detention facilities shall be
designed to meet a minimum of 15 minutes of chlorine contact at the
peak pumping rate.
An Engineer's Report, and Plans and Specifications have been submitted
to the Dutchess County Health Department for approval of Chlorine
Detention facilities for both the Hilltop and Rockingham Wellfields. (See
Appendix H herein).
It is proposed to supply one chlorine contact chamber comprised of a fifty
(50) foot length of four (4) foot diameter pre-stressed, steel cylinder type,
concrete pressure pipe, at the Rockingham Waterworks System (4,700
gallon total capacity).
Likewise, it is proposed to supply one chlorine contact chamber
comprised of one (1), 185 feet length of four (4) feet diameter
prestressed, steel cylinder type, concrete pressure pipe at the Hilltop
Waterworks System (17,390 gallon total capacity).
As of this date, no chlorine detention facilities have been designed for the
Atlas Wellfield. This would have to be addressed as part of the
development of the wellfield site.
STORAGE:
The existing 1,300,000 gallon Central Wappinger Water storage facilities
(Cider Mill Loop Tank and Maxwell Place Tank) presently have the
capacity to provide 1.6::t days of storage at average daily flows. This
figure decreases to 1.0::!: day of storage at peak flows.
The existing North Wappinger Water Improvement storage facilities
consist of a drastically undersized hydropneumatic tank.
Michael E. Burke
RE: Wappinger Four District
- 6 -
November 3, 1997
Under this proposal, these existing small, storage facilities would be
abandoned. The newly proposed district would be serviced by two (2)
new tanks, a 4.0 million gallon tank to be constructed at the present
Cider Mill Loop site, and a 0.3 million gallon tank to be constructed on
Cedar Hill Road.
Should you have any questions regarding this project's description, please
do not hesitate to contact this office.
Very truly yours'l:
~,~ LJ J -
Joseph W. Grogan
Junior Design Engineer
JWG:law
Enclosure
cc: Hon. Constance O. Smith, Supervisor w/enclosure
Hon. June Visconti, Councilperson w/enclosure
Hon. Vincent Bettina, Council person w/enclosure
Hon. Joseph Ruggiero, Councilperson w/enclosure
Hon. Robert Valdati, Councilperson w/enclosure
Elaine Snowden w/enclosure
Albert P. Roberts, Esq. w/enclosure
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