HomeMy WebLinkAbout20190815 The Grove at Neumann Water and Sewer Report Engineering Report
Water and Sanitary Sewer
For
St. John Neumann Residence
Residential Adaptive Reuse
Saratoga Springs, New York
PB #14.039
Prepared For:
Neumann Building, LLC
18 Division Street, Suite 401
Saratoga Springs, NY 12866
Prepared By:
The LA Group, P.C.
40 Long Alley
Saratoga Springs, New York 12866
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September 2014
St. John Neumann Residence
Residential Condominium Complex
PROJECT DESCRIPTION
Neumann Building, LLC is proposing the adaptive reuse of the existing retirement home at 233
Lake Avenue in the city of Saratoga Springs, NY (Tax Map Parcel 166.00-4-22) for the purpose
of constructing senior apartments within the existing structure and also two additional new
wings. The site is the former home for retired priests. In addition to the existing building, there
are grassed and forested cover types on the property. The site is generally flat. The surrounding
area is developed with the St. Clements Church and school to the west and residential housing to
the east, north and south.
The apartment complex proposed will consist of two new wings attached to the existing main
building. The project is proposing a total of 76 residential units, totaling 114 bedrooms. 48 of
the units will be located in the new wings. The units will have internal fire sprinklers, and fire
hydrants will be located adjacent to the new entry drive southeast and northeast of the building.
EXISTING CONDITIONS
Water Distribution — An 8-inch water main is present on the south side of Lake Avenue, across
the street from the project. A hydrant flow test conducted on 5/6/14 at Lake Avenue and
MacArthur Drive indicates static pressures in the area of 78 pounds per square inch (psi).
Projected available fire flow is 1,672 gallons per minute at 20 psi. See flow test results attached.
Sanitary Sewer— An existing 16-inch sanitary sewer main owned and maintained by the City of
Saratoga Springs runs in a westerly direction past the property on the south side of Lake Avenue.
At the intersection of East Avenue, the wastewater flows north in East Avenue, then west in
Excelsior Avenue to the Saratoga County Sewer District No. 1 Pump Station on High Rock
Avenue for eventual transmission to the County Sewer Treatment Plant in Mechanicville.
SEWER AND WATER USAGE
The information below provides information on the anticipated average potable water use and
wastewater flow rates for the project. Water use and wastewater flow are estimated to be equal
for this study.
Number of proposed bedrooms— 114 x 110 gallons/day = 12,540 gallons/day
Number of existing bedrooms—43 x 150 gallons/day = 6,450 gallons/day
12,540— 6,450 = 6,090 gallons/day increase in water flow
Summary of Design Flows
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St. John Neumann Residence
Residential Condominium Complex
Average values for water consumption and sewer flows are based on a 12-hour day. Peaking
factor for instantaneous water use is estimated to be 10 times the average based upon past
experience. Peaking factor for sanitary sewer flow is approximately 4.2 times the average.
Average daily demand for water usage is anticipated to be 17.4 gallons per minute (gpm).
Instantaneous peak flow is estimated at 174 gpm.
Average daily flow for wastewater is anticipated to be 17.4 gpm. Peak hourly flow is estimated
to be 74 gpm.
PROPOSED CONDITIONS
Water Distribution — To service the project, the existing 8-inch main in Lake Avenue will be
tapped to provide an 8-inch combined fire protection and domestic service lateral to the site. A
combined fire protection and domestic waterline will be brought to the building's mechanical
room where the domestic line will tee off and be metered. Two site fire hydrants are proposed at
the south and north sides of the building.
The estimated fire sprinkler demand has been calculated at 494 gallons per minute at 48 psi at
the base of the riser. The projected available supply is 1,672 gpm at 20 psi. Applying the 494
gpm demand to the flow graph gives a residual pressure of approximately72 psi.
Connections and appurtenances, including mechanical joints, tees, isolation valves, thrust blocks,
fire hydrants, trenching, bedding, service connections, as well as testing and disinfection will all
be specified in accordance with City of Saratoga Springs standards.
Sanitary Sewer— Sanitary wastewater will be piped from the new apartment wings to the front of
the existing building via two 6-inch PVC laterals. The two laterals will converge at a new site
sanitary sewer manhole. From the new manhole, a six-inch PVC lateral installed at a slope of
approximately 1.0% will be brought across Lake Avenue and connected to the existing sanitary
sewer main with a tapping wye saddle designed for the specific type of pipe. From this point of
connection to the City collection system, wastewater flows as described in the Existing
Conditions section above. The Saratoga County Sewer District was contacted and has verified
that the pump station has the capacity to handle the additional flows from this project. See e-
mail correspondence attached.
All sanitary sewer lines, manholes and connections will be furnished and installed according to
City of Saratoga Springs standards.
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St. John Neumann Residence
Residential Condominium Complex
1. From Table 3, NYSDEC 1988 Design Standards for Wastewater Treatment Works
2. From Figure 1, GLUMRB Recommended Standards for Wastewater Facilities
Q= (18+P Y2) ±(4 +P Y2) where P=population in thousands
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