HomeMy WebLinkAbout20230032 Crescent & Jefferson Site Plan Sewer Loading Calculations
January 13, 2023
Deborah LaBreche, PE, Civil Engineer
City of Saratoga Springs
474 Broadway
Saratoga Springs, NY 12866
RE: Liberty at Saratoga – Sewer Loading Calculations
City of Saratoga Springs, Saratoga County, New York
LaBella Project #2224112
Dear Ms. LaBreche,
We are pleased to present you with the sanitary sewer loading letter evaluation in support of the
proposed development of the Liberty at Saratoga affordable work force housing project, along
Crescent Avenue, in the City of Saratoga Springs, Saratoga County, New York. Liberty Affordable
Housing, Inc. (the “Developer”) is proposing to construct two (2) 25,000+/- SF affordable workforce
housing buildings, comprised of 212 units, on an existing vacant parcel of land across Bunny Lake
Drive from the Saratoga Casino Hotel. A summary of the anticipated increase in sewer loading from
the project is presented below.
Municipal Sanitary Sewer System:
All sanitary sewer discharge from the project site will be directed, via gravity, to an on-site pump
station. The pump station will discharge, via force main, west toward Jefferson Street connecting to
the City’s municipal sanitary sewer manhole between Crescent Avenue and Clubhouse Drive. It is our
understanding based on conversations with the City Engineering Department and Saratoga County
Sewer District 1 (SCSD), after connecting to the City’s system within Jefferson Street, the municipal
sewer discharges through an 8” PVC pipe to an existing pump station at the intersection of Jefferson
Street and Crescent Avenue, which is owned and operated by Saratoga County.
The anticipated average daily sewer loading can be calculated by using Table B.3 of the NYSDEC
Design Standards for Intermediate-Sized Wastewater Treatment Systems, March 2014. As
mandated by Section 15-0314 of the Environmental Conservation Law, plumbing facilities in new
and renovated buildings must use water-saving fixtures and, therefore, the demand per Table B.3 is
representative. The breakdown of bedrooms per unit, used in the average daily domestic water
demand calculation, for the proposed development is summarized in Table 1 below.
Table 1: Unit Breakdown by Bedroom
Floor Studio One-Bedroom Two-Bedroom Three-Bedroom Total Units
per Floor
North Apartment Building
1 5 10 11 0 26
2 5 11 11 1 28
3 5 11 11 1 28
4 5 11 11 1 28
Totals 20 43 44 3 110
2
South Apartment Building
1 3 10 11 0 24
2 3 11 11 1 26
3 3 11 11 1 26
4 3 11 11 1 26
Totals 12 43 44 3 102
The resulting anticipated average daily sewer loading for the proposed development is summarized
in Table 2 below.
Table 2: Anticipated Domestic Water Demand
Use No. Bedrooms Hydraulic Loading Average Day
Demands
North
Apartment
Building
Studio 20
110 GPD/bedroom
2,200 GPD
One-Bedroom 43 4,730 GPD
Two-Bedroom 88 9,680 GPD
Three-Bedroom 9 990 GPD
South
Apartment
Building
Studio 12 1,320 GPD
One-Bedroom 43 4,730 GPD
Two-Bedroom 88 9,680 GPD
Three-Bedroom 9 990 GPD
Average Day Total 34,320 GPD
Maximum Day (2x Average Day) 68,640 GPD
Peak Hourly (4x Average Day) 95 GPM
As demonstrated above, the anticipated increase in average daily sewer loading for the project is
estimated to be 34,320 GPD. Applying a factor of two (2) to determine the maximum daily demand
yields 68,640 GPD. Applying a factor of four (4) to determine the peak hourly sewer loading yields
137,280 GPD or 95 GPM.
In summary, it is anticipated that the proposed development will not adversely affect the City of
Saratoga Springs sanitary sewer system and the Saratoga County pump station. We are requesting
that the City Engineer’s office verify that the municipal system can accommodate the increase in
loading in the form of a will serve letter. In addition, the Applicant will submit these calculations and
drawing plan set to Saratoga County to verify that the County pump station can accommodate the
increase in loading as well. If you have any questions regarding the above, please do not hesitate to
contact this office at 518-266-7307 or by email at sdrury@labellapc.com.
Respectfully submitted,
LaBella Associates
Sara Drury, EIT
Civil Engineer