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Home My WebLink About009 - TWAS - Utility ReportUtilities Report Tidal Wave Auto Spa August 4, 2023 Utilities Report To: City of Bozeman From: DJ&A P.C. (Civil Engineer for subject project) Cc: John Lapointe, Property Developer Date: 08/04/2023 Re: Bozeman Tidal Wave Auto Spa – Utilities Report ________________________________________________________________________________________ This report addresses how water and sanitary sewer facilities were designed for the Tidal Wave Auto Spa. These service laterals were designed to meet the Montana Public Works Standard Specifications (MPWSS) and the City of Bozeman Engineering Division Standards. This report will cover an introduction with general information about the project and info regarding the existing conditions. This report will then move on to discuss the proposed water and sewer improvements for this site and how each element was designed. For narrative and calculations related to stormwater, see the separate Drainage Report. Utilities Report Tidal Wave Auto Spa August 4, 2023 Table of Contents Utilities Report ............................................................................................................................... 1 Introduction ................................................................................................................................... 1 1.0 General Information .................................................................................................... 1 1.1 Existing Wastewater Facilities .................................................................................... 2 1.2 Existing Water Facilities .............................................................................................. 2 Proposed Improvements ............................................................................................................... 2 2.0 Gravity Sewer System Improvements ......................................................................... 2 2.1 Water System Improvements ...................................................................................... 2 References .................................................................................................................................... 4 Appendices Appendix A Utility Plans……………………………………………………………………...5 Appendix B Sewer and Water Demand Calculations.….………………………………...6 Utility Report Tidal Wave Auto Spa 1 Introduction 1.0 General Information The project site is located in Bozeman, Montana on the northwest corner of North 19th Ave and Valley Center Road and is in Gallatin County Subdivision Phase 1, Section 35, Township 1 South, Range 5 East, Lot 2, Gallatin County, Montana. The existing project site is an undeveloped lot with a sewer main running through the Northern end of the property and a water main running through the Southern end of the property. Figure #1: Project Site The sewer and water system will be owned and operated by the business operator, Tidal Wave Auto Spa. The Engineer of Record for the sanitary sewer and water service laterals portion of this project is Mike Russell, 59647PE, licensed in the State of Montana. Utility Report Tidal Wave Auto Spa 2 1.1 Existing Wastewater Facilities The City of Bozeman’s existing sanitary sewer main is running from west to east within an existing 30’ public utility easement. This main line is identified as 24” diameter Poly Vinyl Chloride (PVC) pipe according to the Bozeman Infrastructure viewer. Along the sewer main alignment through this property is a sewer manhole near the northeast. There is an assumption that a 10” stub exists at this manhole, this assumption is based on pre-design meetings with the city. The current design will tie into this existing stub for wastewater service. Additionally, this sewer main line will be protected in place during construction activities but will be tied into for service connection. 1.2 Existing Water Facilities The City of Bozeman’s existing water main is running west to east within an existing 30’ public utility easement on the site property. This main line is identified as 12” diameter Ductile Iron (DI) pipe according to the Bozeman Infrastructure viewer. There is no known accompanying water appurtenances located on this property. This water main line will be protected in place during construction activities but will be tied into for service connections. There are no existing fire hydrants located on this property, with the nearest fire hydrant located approximately 250 feet from the property line at the neighboring Residence Inn. This project will install a new fire hydrant located near the wash tunnel exit. Proposed Improvements 2.0 Gravity Sewer System Improvements The gravity sewer system improvements include: a sewer service lateral to service the proposed carwash building, which will tee two incoming lines from the carwash building. One service line will be coming from the carwash’ s restrooms and the other line will come from the recirculation tank. The proposed sewer service laterals shall maintain a minimum of 1% slope towards the sewer main. All proposed sewer services laterals for this site are proposed to be 6” in diameter. These laterals will all feature cleanouts at bends that are present, as well as, upon entering the proposed building, grease interceptor and comfort station. International Carwash Association (ICA), has provided the building demand to be 17.7 GPM on average and 74.5 GPM at peak hour. 2.1 Water System Improvements The water system improvements include a potable water service to the proposed building, as well as a fire hydrant lateral/assembly to a proposed fire hydrant in a landscape island near the carwash exit. Utility Report Tidal Wave Auto Spa 3 The proposed potable water service for the proposed building will tie into the existing water main within public utility easement. This water service lateral is proposed to be 2” diameter. Due to the nature of the proposed building, there is no proposed fire service later. For the purposes of fire protection—this project will include a fire hydrant lateral/assembly within a landscape island of the parking lot. This hydrant will have a line that runs south to tie into the existing water main running through the property. This fire hydrant lateral will be 6” diameter. ICA has provided the water demand for this project to be 20.8 GPM on average and 87.2 GPM at peak hour. For the purposes of landscape management - the site will incorporate landscape irrigation to ensure the upkeep of its visual appeal. DJ&A Landscape architects have calculated an average irrigation water demand of 20.8 GPM. This irrigation system is vital for sustaining the landscaping's aesthetics and vitality, in line with the site's water management goals. Utility Report Tidal Wave Auto Spa 4 References City of Bozeman Municode. (Published in 2011). Montana Department of Environmental Quality. (May 3rd, 2016 Edition). Circular DEQ-2 - Design Standards for Public Sewerage Systems. Montana Public Works Standard Specifications. (2021, 7th Edition). Utility Report Tidal Wave Auto Spa 5 Appendix A – Utility Plan FO * * * * * * UGT UGT UGT UGT FO FO FO FO FO FO FO FO FO FO FO UGP UGP UGP UGP UGP ES ES ES ES ES UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT UGT EW EW EW EW EW EW EW EW >>>>>>>>>>>>R/W R/W R/W TT E E E E EE WV TV E E E E E T T T T S E E E E E E TVTVTVTVTVTVTVTVTVTVTVTVTV TV S 6''S 6''S 6''S 6''W 2''W 2''EEEEEEEEEEE EEEEEWVEEEE HY DWVSWSWSWSWSWSWSWSW>>>>>>>>>>>>>>>& ENGINEERS PLANNERS SURVEYORS DESIGNER DRAWN CHECKED PROJ. NO. DATE SURVEYED DESCRIPTIONDATEREVISION SHEET OF 8/17/23 10:52 KYLE.DRUYVESTEIN F:\7350 TIDAL WAVE AUTO SPA, NORTH 19TH, BOZEMAN\DRAWINGS\DWG\CIVIL\5 SHEET PRODUCTION\5 - UTILITY PLAN.DWG;255 --- DJ&A, P.C. 08/25/2023 7350 MR KD KD UTILITY PLANBOZEMAN, MT TIDAL WAVE AUTO SPA SCALE IN FEET 0 25 50 DRY UTILITIES (TELEPHONE, FIBER, POWER, PROTECT IN PLACE, TYP. DRY UTILITY APPURTENANCES, PROTECT IN PLACE, TYP. STREET LIGHTING, PROTECT IN PLACE, TYP. TELEPHONE PEDESTAL, PROTECT IN PLACE, TYP. WATER RECLAIM LINES AND TANKS, SEE DETAIL 1 SHEET 15 (2)6" SCH 80 CONDUIT LINES TO BE INSTALLED UNDER CONCRETE TO ROUTE THE ELECTRICAL LINES TO VACUUM SYSTEMS ON NORTHWEST SIDE OF DRIVE AISLE, SEE ELECTRICAL SHEETS SEE ELECTRICAL SHEETS FOR CONDUIT ROUTES FOR PAY STATION APPURTENANCES 6" Ø SANITARY SEWER SERVICE LINE, TYP. SEE DETAIL 1, SHEET 10 2" Ø WATER SERVICE LINE, TYP. SEE DETAIL 2, SHEET 9 SEWER CLEANOUT REQ'D AT BENDS, TYP. SEE DETAIL 3, SHEET 9 24" Ø PVC SEWER MAIN, PROTECT IN PLACE, TYP. 12" Ø DUCTILE IRON WATER LINE, PROTECT IN PLACE, TYP. UNDERGROUND ELECTRICAL SERVICE LINE, ROUTING SHOWS SCHEMATIC LAYOUT, COORDINATE WITH ELECTRICAL PLANS UNDERGROUND TELEPHONE LINE, SEE ELECTRICAL SHEETS WATER VALVE, 8' FROM TIE IN TO WATER MAIN GENERAL NOTES 1.CONTRACTOR TO VERIFY EXISTING CONDITIONS PRIOR TO COMMENCEMENT OF CIVIL-RELATED WORK. 2.UTILITIES SHOWN ON THE PLANS ARE APPROXIMATE. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY LOCATIONS OF ALL UTILITIES WITHIN THE PROJECT LIMITS. 3.SEE LANDSCAPING SHEET FOR IRRIGATION LINES. 4.SEE ELECTRICAL SHEETS FOR SITE LIGHTING. 5.CONTRACTOR TO ENSURE ADEQUATE SLOPE FOR SEWER SERVICE LINE. 6.DRY UTILITY LINE LAYOUTS SHOWN FOR SCHEMATIC PURPOSES. CONNECT TO EXISTING 24" PVC SANITARY SEWER MAIN AT APPROX. 4666.33, CONTRACTOR TO VERIFY. PER CITY OF BOZEMAN, A STUB EXISTS AT THE MANHOLE THAT CAN BE TIED TO. SEWER MANHOLE RIM ELEVATION: 4666.33 NNWE TRANSFORMER WITH ELECTRICAL METER ATTACHED ON TOP 6.5' X 7.5' CONCRETE PAD, SEE ELECTRICAL SHEETS FIRE HYDRANT PER CITY OF BOZEMAN STANDARDS 6" Ø FIRE HYDRANT ASSEMBLY PER CITY OF BOZEMAN STANDARDS SEE ARCHITECT PLANS FOR UTILITY TIE IN ELEVATIONS TO BUILDING SEWER SERVICE LINE AT APPROX. 4666, CONTRACTOR TO VERIFY SANITARY TEE NEEDED TO TIE IN RESTROOM SERVICE LINE 12" Ø HDPE CORRUGATED STORMWATER PIPE TO FLOW AND DAYLIGHT AT DRAINAGE POND DOWNSPOUTS TO BE PIPED UNDERGROUND WITH 3" Ø HDPE PIPE TO TIE INTO MAIN 12" Ø PIPE AND DRAIN TO POND. 3" Ø HDPE PIPE WILL SLOPE A MINIMUM OF 4% TYING INTO THE 12" Ø PIPE WHICH WILL SLOPE AT A MINIMUM 1%. PROPERTY LINE, TYP. DRAINAGE POND TRASH/RODENT RACK REQ'D AT PIPE OUTLET Utility Report Tidal Wave Auto Spa 6 Appendix B– Sewer and Water Demand Calculations Wastewater Daily Flow Analysis Tidal Wave Auto Spa Car Wash Average Daily Flow Daily Water Usage (Applicant provided)10,000 gpd Estimated Vehicle/Day 200 vehicles Est. Water Usage/Vehicle 50 gallons/vehicle % of Loss due to drive-off/evaporation 15%See Note #1 below Est. Wastewater Discharge/Vehicle 42.5 gallons/vehicle Estimated Daily Wastewater Discharge 8,500 gallons/day Conversion to Residential Population 65 gallons/person/day Equivalent Population 131 people =Q(max)= 18 + P 0.50 P = Population/thousands = 131/1000 = #### Q(ave)4 + P 0.50 Peaking Factor = Peak Hour Sewer Demand Average Daily Flow 8,500 gpd 1,063 gph 8-hour period 17.7 gpm Peaking Factor 4.21 Peak Hour Sewer Demand 4,473 gph 74.5 gpm 597.95 cfh 9.97 cfm 0.166 cfs Notes: 1. Data provide from a report prepared by International Carwash Association 8/25/2021 4.21 Peaking Factor Estimated Water Demand Analysis Tidal Wave Auto Spa Car Wash Average Daily Flow Daily Water Usage (applicant provided)10,000 gpd Estimated Vehicle/Day 200 vehicles Estimated Water Usage/Vehicle 50 gallons/vehicle Estimated Daily Water Usage 10,000 gallons/day Conversion to Residential Population 65 gallons/person/day Equivalent Population 154 people =Q(max)= 18 + P 0.50 P = Population/thousands = 154/1000 = #### Q(ave)4 + P 0.50 Peaking Factor = Peak Hour Water Demand Average Daily Demand 10,000 gpd 1,250 gph 8-hour period 20.8 gpm Peaking Factor 4.19 Peak Hour Water Demand 5,234 gph 87.2 gpm 699.77 cfh 11.66 cfm 0.194 cfs 8/25/2021 4.19 Peaking Factor WATER SOURCE INFORMATION:Estimated Average Demand =20.8 GPM FLOW AVAILABLE:Custom Max Flow =45.15 GPM Flow Available =45.15 GPM PRESSURE AVAILABLE:Static Pressure at POC =50 PSI Pressure Available =50 PSI DESIGN ANALYSIS:Maximum Station Flow =30 GPM Flow Available at POC =45.15 GPM Residual Flow Available =15.15 GPM CRITICAL STATION (12):Design Pressure =40 PSI Friction Loss =3.02 PSI Fittings Loss =0.3 PSI Elevation Loss =0 PSI Loss through Valve =1.5 PSI Pressure Req. at Critical Station =44.8 PSI Loss for Fittings =0.35 PSI Loss for Main Line =3.51 PSI Loss for POC to Valve Elevation =0 PSI Loss for Back Flow =0 PSI Critical Station Pressure at POC =48.7 PSI Pressure Available =50 PSI NOTE: 1. Generated 2023-08-07 Landscape Irrigation Demand Tidal Wave Auto Spa