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i~ <br />i~ <br />i~ <br />i~ <br />i~ <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Scenario 2, which would be 0.148 MGD and the estimated peak hour flow would be <br />0.83 MGD <br />Table 18-7 summarizes the estimated wastewater flow generated from the study <br />area under Scenario 3. <br />Table 18-7. Estimated Average Day and Peak Hour Wastewater Flow from Scenario 3 <br /> <br />Average Daily Total Average <br />Peak Hour <br /> <br />Type Acres Housing <br />Wastewater Daily <br />Wastewater <br /> (Gross) (units) Flow (gpd) Wastewater Flow (gpd) <br /> Flow (gpd) <br />High Density <br />46 <br />920 <br />200/unit <br />184,000 <br />662,000 <br />Residential <br />Job Area 116 1,000/acre 116,000 418,000 <br />Destination Retail 45 - 1,400/acre 63,000 227,000 <br />Temporary 20 - 0 0 0 <br />Destination Retail <br />Transit Center 8 - 1,000/acre 8,000 29,000 <br />Service/ 3 _ 1,400/acre 4,200 15,000 <br />Commercial <br />Open Space 5 - 0 0 0 <br />Right-of-Way 10 - 0 0 0 <br />Total 253 375,200 1,351,000 <br />Table 18-8 summarizes the estimated wastewater characteristics and loading for <br />the wastewater that will be generated from the 171St Avenue AUAR study area <br />under Scenario 3. <br />Table 18-8. Estimated Wastewater Characteristics and Total Average Daily Wastewater <br />Loading from Scenario 3 <br /> <br />Parameter Estimated Wastewater Characteristics and <br />Average Day Loading <br /> mg/I Ibs/day <br />Biochemical Oxygen Demand 295 923 <br />Total Suspended Solids 150 469 <br />Total Phosphorous 6.5 20 <br />As with Scenario 1 and 2, wastewater generator from the study area will be <br />conveyed north through existing 15-inch and 18-inch trunk sewer lines along Twin <br />Lakes Road to 179th Avenue NW and then west through the 24-inch trunk sanitary <br />sewer to the TH 169 Lift Station. <br />Wastewater from the portion of the study area on the west side of TH 10 could be <br />conveyed north through a new sanitary sewer line constructed along the west side <br />of TH 10 and connected to the existing 15-inch sewer that crosses TH 10 just north <br />of 170th Avenue (Figure 18-2). A 10-inch sewer would be large enough to convey <br />the estimated peak hour flow of 0.83 MGD wastewater generated from this area <br />Ciry of Elk River <br />Draft Alternative Urban Areawide Review <br />July 2011 <br />Page 49 of 84 <br />