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SANITARY SEWER DEMANDS Sanitary Sewer Systems Figure 5 indicates the proposed development schedule for extending sewer in the proposed 2000 MUSA areas. The areas proposed to be exchanged under this amendment are highlighted. As indicated, sewer is proposed to be extended to these new MUSA areas in 1989. Each area is identified alphabetically and can be cross referenced to Tables 3 and 4. Table 3 illustrates the projected wastewater flows for the Rum River Watershed through the year 2000. As indicated, residential land use will be the primary contributor to these flows with approximately 96% of the total flow projected for the year 2000. Residential flow is projected to be 0.341 mgd with total projected flow of 0.356 mgd (129.9 million gallons per year). Table 4 illustrates the projected wastewater flows for the Mississippi River Watershed through the year 2000. As indicated, Table 3 residen- tial flow in this watershed is relatively low with a projected ulti- mate flow of 0.041 million gallons day (mgd) or 14.97 million gallons per year. This watershed is zoned predominantly for industrial use, thus the heaviest contributor to wastewater flows in this watershed will be industrial users. The total projected flow for all land uses for the year 2000 is 0.668 mgd or 243 million gallons /year. Table 5 summarizes the developed and undeveloped acreage by watershed for the current year and projected development by the year 2000. As indicated, the developed acreage within'the sewered area of both watersheds is projected to double by the year 2000. As projected, approximately 80% of the net developable acreage within the expanded MUSA would be developed by the year 2000. Projected wastewater flows for each watershed are illustrated by year through 2000 on Tables 6 and 7 and are summarized in Table 8. The estimated flow in 1989 is 0.076 mgd or approximately 28 million gallons per year. This compares favorably to the MC's projected flow range for 1990 of 20 -30 million gallons per year (mgy) and is well within the capacity limit set for the City. Projected growth and resulting flows, however, indicate that by 1993, the City will exceed MC's projection of wasteflow for the year 2000. Figure 6 illustrates the existing sewered area within the City and proposed sanitary sewer trunk extensions. The development schedule for these trunk extensions are further detailed on Figure 6. Wastewater flow for both watersheds is treated at the Anoka treatment plant with a rated capacity of 2.46 mgd (Figure 7). The Anoka plant is to be phased out in 1990 with flows diverting to the Metropolitan treatment plant via the Champlin- Anoka- Brooklyn Park interceptor. 11