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HomeMy WebLinkAbout20180574 Bethesda Parish House Water and Sewer Report 2-27-20 � The La GRC�UP � ���`� � ' ���� ' ' `��- � � � �� SE���� ��s t >>s����r �>>so . 1 c - ,� t,,x_ ���,_�„ �� ,�m '.I 1•..i'��:l��i�.l'i!llli _I . i.. :I�lr.r,j:li.: l�(. Engineering Report Water and Sanitary Sewer For Bethesda Parish House Saratoga Springs, New York PB #15.020 Prepared For: Bethesda Church 26 Washington Street Saratoga Springs, NY 12866 Prepared By: The LA Group, P.C. 40 Long Alley Saratoga Springs, New York 12866 July 14, 2015 Revised February 27, 2020 Bethesda Parish House 201515 PROJECT DESCRIPTION Bethesda Church is proposing the construction of a multi-use building on the land adjacent to the existing church at 26 Washington Street in the city of Saratoga Springs, NY. The multi-use building will consist of a Great Hall, library which will be used for small groups, 30 bedroom facility, and offices. EXISTING CONDITIONS Water Distribution — A 10-inch ductile iron water main is located in the middle of Washington Street. A hydrant flow test conducted on April 22, 2015 at 41 Washington Street indicated a static pressure in the area of 89 pounds per square inch (psi). Projected available fire flow is 4,255 gallons per minute (gpm) at 20 psi as calculated below: QR - QF X �HR � HF�0.54 _ �1,z3�� X ��s9-zo��(s9-sz��o.54 = 4,255 gpm Where: Qx = Rated Capacity at 20 psi (gpm) QF = Total test flow (gpm) Hx = Static Pressure minus 20 psi HF = Static Pressure minus Residual Pressure Sanitary Sewer — An existing 12-inch PVC sanitary sewer main owned and maintained by the City of Saratoga Springs runs down the middle of the Washington Street and flows to the east. SEWER AND WATER USAGE Table 1 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. Average Daily Flow(ADF) _ Great Ha1L (150 seats)x (20 gpd/seat) = 3,000 gpd Library (Assembly Hall): (40 seats)x (5 gpd/seat) = 200 gpd ResidentiaL (30 bedrooms)x (110 gpd/bdrm) = 3,300 gpd Offices: (23 employees)x (15 gpd/employee) = 345 gpd Tota1= 6,845 gpd 1 Bethesda Parish House 201515 Summary of Design Flows Average values for water consumption and sewer flows are based on an 8-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 4.13 times the averagei. Average daily demand for water usage is anticipated to be 14.26 gallons per minute (gpm). Instantaneous peak flow is estimated at 142.60 gpm. Average daily flow for wastewater is anticipated to be 14.26 gpm. Peak hourly flow is estimated to be 58.89 gpm. PROPOSED CONDITIONS Water Distribution — To service the project, the existing 10-inch main along the middle of Washington Street will be tapped to provide a 6-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. Fire suppression for the building will be provided by fire sprinklers. The closest fire hydrant is located in front of the existing church. The fire sprinkler demand is 600 gpm at 60 psi. The proposed water service will provide sufficient flow and pressure to meet the fire sprinkler water demand. Connections and appurtenances, including mechanical joints, tees, isolation valves, thrust blocks, 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 sewer service for the project will be provided from the City of Saratoga Springs sewer main along Washington Street. A 6-inch sewer service from the proposed building is proposed to wye into the existing sewer main. The sewer lateral will maintain a minimum slope of 2%. All sanitary sewer lines, manholes and connections will be furnished and installed according to the City of Saratoga Springs standards. 1. From Figure 1, GL UNIRB Recommended Standards for Wastewater Facilities Q= (18 +P%z)=(4 +P%z) where P=population in thousands 2 FIRETEK SPRINKLER SYSTEMS, LLC. FLOW TEST INFORMATION SHEET 1. Reason for Test: Design Design Base Other 2. Location of Property: 41 WASHINGTON ST SARATOGA SPRINGS NY SARATOGA (Address) (City) (State) (County) 3. Date&Time of Test: Date: 4/22/15 Time: 7:30 (am) 4. Test Conducted by: RICK BOUCHER V.P. FIRETEK SPK. SYS., LLC Name Title Affiliation 5. Test Witnessed by: DEB LABRECHE ASST. CITY ENGINEER SARATOGA SPRINGS Name Title Affiliation 6. Source of Water Supply: CITY 7. Name of Water District: SARATOGA SPRINGS 8. Is water supply provided with PRV STA's Yes NO (If so what is PRV outlet setting? PSIG 9. Area Map: (Draw Sketch showing property location; bounding streets and names, north arrow, hydrant locations and identification numbers, distances from hydrants to property elevations of hydrants and property floors or grade, all water mains and sizes and interconnection valves, etc.) SEE ATTACHED MAP 10. Flow Test Data FLOW AT STATIC AT STATIC RESIDUAL FLOW OUTLET ADJUSTED HYDR.NO. HYDR.NO. PSIG PSIG GPM COEFFICIENT GPM 1 2 89 82 1237 .90 1113 11. 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