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BRUSH COLLEGE ROAD SEWER STUDY City of Decatur <br /> SMS I <br /> , m <br /> U <br /> LRA Industnd Oowe <br /> a � i <br /> : S`Fm:etmm s� <br /> ,!tnl' ' Futtue Grax m? � � Funve(:irnen1 <br /> :.fAV Rea,Badge Ro-ad S.�GU' <br /> FumeC:rax m I Snticm <br /> LSNJ` <br /> Legend <br /> Adart Fumo S14uan <br /> Ptarmea . <br /> Fnaue Cnaxiry': �—ry F'utwe <br /> New <br /> Figure 2.Preliminary Pump Station and Sewer Layout <br /> Gravity Sewers.Gravity sewers will convey sanitary and industrial wastewater from the various developments in <br /> the Service area to a new pump station.We understand that the initial development in the service area will be <br /> on the southeast corner of the Reas Bridge Road and Brush College Road intersection.The pump station will <br /> be located near the Reas Bridge Road and Brush College Road intersection,therefore the initial need for <br /> municipal gravity sewers may be minimal.As this area is developed,additional gravity sewers will be required. <br /> Pump Station.A new pump station at the intersection of Reas Bridge Road and Brush College Road will lift <br /> sewage from developments in this area to the existing collection system.Two 30-hp pumps are recommended <br /> for the Phase I projected flows based on the preliminary pumping calculations( <br /> Table 2).A third 30-hp pump would be installed in Phase II,which would give the station a rated capacity of <br /> 1,325 gpm.As the area becomes fully developed in Phase III, higher flows area expected,and additional <br /> improvements will include larger pumps and an an expansion of the pump station facilities. <br /> Table 2.Pumping and Forcemaln Requirements <br /> Peak Flow Range Assumed Forcemain Flow per <br /> Area(Acres) (in) Pump No pump Pump HP <br /> Phase (gpm) <br /> 1 270 680 118 8 1,2 680 30 <br /> 11 560 1,325 308 8 1, 2, 3 680 30 <br /> III 1,060 2,830 550 12 or 8&8 1,2,3 1,415 50 <br /> Forcemain.An 8-inch forcemain from the new pump station to the 27th Street sewer will maintain acceptable <br /> velocity for both Phase I and Phase II flows.A parallel 8-inch forcemain would be required to convey the <br /> additional flow from Phase III developments. <br /> Costs <br /> Capital cost estimates for each phase was estimated.Phase I is expected to be designed and constructed in <br /> 2021-2022.The costs estimated here are in 2021 dollars.The actual costs for Phase II and Phase III will <br /> depend, in part,on when they are constructed.The estimated probable construction costs for each phase are <br /> shown in Table 3. <br /> Clark Dietz,Inc. 5 January 2021 <br />