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Elk — Elk River c.vei nrg Area rs <br /> River <br /> Water System <br /> Slopes from south to north will not be a constraint for water system development, unlike that of the <br /> sanitary sewer. Based on the high ground elevations in the southern portion of the study area and the <br /> pressure in the existing system, it will be necessary to create a higher pressure zone. A water tower will <br /> eventually be needed to provide adequate pressure to the high ground areas and fire flow volume for <br /> the remaining study area. Depending on the extent and pace of development,a second water tower <br /> could be sited further to the north to provide additional fire flow volume. <br /> Based on the size of the study area, several additional wells and water treatment plants(WTPs)will <br /> need to be constructed to provide for the water demand of the area.The timing of the wells and WTPs <br /> will be dictated by the pace of development. Because of landfilling activities in the area,care will have to <br /> be taken in the siting of new wells.The recommended phasing of this improvement is discussed in <br /> further detail below. <br /> Initially water should be provided to the initial expansion areas by a pumping station that pumps water <br /> from the existing system.The pumping station may need to pump continuously to maintain pressure, if <br /> feasible.The area would require a standpipe with a booster station. After there is sufficient <br /> development to warrant it,a water tower should be constructed.Wells and WTPs should be constructed <br /> when water demand warrants their construction. Following construction of the wells and WTPs,the <br /> pumping station could be retained as an emergency means of providing water to the expansion area. <br /> Potential locations of a water tower or booster station site are indicated in Figure 23. <br /> Assuming 80 to 100 gallons per day usage for residential development,and 800 to 1,000 gallons per acre <br /> per day for highway business,and 1,000 to 1,200 gallons per acre per day for commercial/industrial flex, <br /> the following water and wastewater needs were identified to serve Phase 1 and Phase 2. <br /> Acreag Acreage- Homes Population Avg water Water usage Total water usage <br /> e- Phase 2 usage(g/d) range(g/d) range(g/d) <br /> Phase Phase 1 Phase 2 <br /> 1 <br /> Low density 136 0 204 569 80-100 45,520 to <br /> residential (1.5 (per person) 56,900 g/d <br /> u/a) <br /> Medium density 138 0 552 1540 80-100 123,200 to <br /> residential (per person) 154,000 g/d <br /> (4 u/a) <br /> Highway Business 78 114 NA NA 800-1000 62,400 to 91,200 g/d to <br /> (per acre) 78,000 g/d 114,000 g/d <br /> Commercial/Indus 178 80 NA NA 1,000-1,200 178,000 to 80,000 g/d to <br /> trial Flex(50/50) (per acre) 213,600 g/d 96,000 g/d <br /> TOTAL 530 194 756 2,109 409,120 g/d to 171,200 g/d to <br /> acres acres units people 502,500 g/d 210,000 g/d <br /> 44 <br />