HomeMy WebLinkAbout20220240 110-114 Nelson Final Subdivision Engineering Report for Water & Sanitary Sewer �
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Engineering Report
Water and Sanitary Sewer
For
NELSON AVENUE SUBDIVISION
110 — 114 Nelson Avenue
SARATOGA SPRINGS, NEW YORK
Planning Board #22.XXX
Prepared For:
JW Hemmingway LLC
563 North Broadway
Saratoga Springs, NY 12866
Prepared By:
The LA Group, P.C.
40 Long Alley
Saratoga Springs, New York 12866
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March 15, 2022
L Prolect Description
The Nelson Avenue Subdivision project consists of the subdivision of the existing lot located at
110-114 Nelson Avenue into four individual residential lots. Three of those lots will have a
residential home and one lot will remain undeveloped for potential future development. As a part
of the subdivision, each lot is planned to have a four bedroom residence and driveway.
II. Existing Water and Sanitarv Sewer Utilities
The e�sting property is used as private parking for patrons to the Saratoga Race Course. Several
gravel roadways e�st on site and the balance of the site is lawn area.
Municipal water service is available from the City of Saratoga Springs. A 12-inch diameter water
main is located on the west side of Nelson Avenue.
Municipal sanitary sewer service is also available from the City of Saratoga Springs. An 8-inch
diameter gravity sanitary sewer main runs along Nelson Avenue. This sanitary line eventually
connects to the Saratoga County Sewer District No. 1 (SCSD), where it ultimately is directed for
conveyance and treatment at the SCSD wastewater treatment plant in Mechanicville.
III. Proiected Water and Wastewater Flows
The table below provides information on the anticipated wastewater flow rates for the project:
Description Use Rate No. of Total Use
bedrooms/residence
(3) 4-bedroom residences 110 gpd/bedroom' 12 1,320 gpd
Total 1,320 gpd
Average daily flow for wastewater is estimated to be 1.2 gallons per minute (gpm)based on a 24
hour day. Estimated peak hourly flow is 5.0 gpm (4.2 x average).�
Average daily demand for water is estimated to be approximately equal to the wastewater flow
or 1.2 gpm. Instantaneous peak demand is estimated at 3.0 gpm3 for each residence giving a total
instantaneous demand of 9.0 gpm.
IV. Proposed Water and Wastewater Utilities
Proposed Water Utilities
To service the project, a 3/4" copper water service is proposed to connect from the frontage of
each new residence to the municipal water service in the street. The proposed subdivision
configuration will require three connections on Nelson Avenue (12-inch water main).
Connections and appurtenances, including corporation stops, trenching, bedding, service
connections, as well as testing and disinfection will all be specified in accordance with City of
Saratoga Springs and NYSDOH standards.
Proposed Wastewater Utilities
For sanitary sewer collection, three 6" PVC sewer lateral connections from the frontage of each
new residence to the municipal sewer service in the street is proposed. The laterals will be
installed at a minimum 2.0% slope per City of Saratoga Springs requirements to ensure adequate
pipe cleansing.
A new sanitary manhole is planned for Nelson Avenue to connect in-line to the existing sanitary
main. This structure will have a 8" PVC line that will run via an easement to Lot 4, which
primarily has frontage along Frank Sullivan Place. This line will be terminated at Lot 4 for
potential connection during a future phase where Lot 4 would be subdivided.
Notes
1. From Table 1,Appendzx 75 A Wastewater Ti^eatment Standards-Residential Onsite Systems
(110 gallons per day per bedroom)
2. From Figure 1, GLUNIRB Recommended Standards for Wastewater Facilities
Q= (18+P'/z)=(4 +P'/z) where P=population in thousands
3. From Tables XIV Community Water Systems Source Book,Ameen
(3.0 gpm/residence)