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33 I I I I I I I I I I I I I I I I I I I 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 0.550 mgd, or 201 million gallons/year. Table 18 provides a projection of 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 60% of the total ultimate flow. Residential flow is projected to be 0.262 mgd with total projected flow of 0.437 mgd (160 million gallons per year). Table 19 summarizes the developed and undeveloped acreage by watershed as of 1993 and estimates the development area for the 2000 MUSA. As indicated, the developed acreage within the sewered area of both watersheds is projected to double by the year 2000. It is estimated that approximately 90% of the net developable acreage within the 2000 MUSA would be developed by the year 2000. Estimated wastewater flows for each watershed are illustrated by year through 2000 on Tables 20 and 21 and are summarized in Table 22. The estimated flow in 1993 was 0.309 mgd, or approximately 113 million gallons per year. Figure 14 illustrates the existing sewered area within the City and proposed sanitary sewer trunk extensions with a schedule for trunk extensions. Wastewater flow for both watersheds is treated at the Anoka treatment plant with a rated capacity of 2.46 mgd. The Anoka plant is being phased out with flows diverting to the Metropolitan treatment plant via the Champlin-Anoka-Brooklyn Park interceptor. Until the plant phase-out is completed, the MWCC is monitoring sewer flow and the City is tracking actual residential equivalent connections. Development proposals are being phased to limit residential construction to comply with the temporary flow limitations of 500 REC's. This policy was adopted by Council Resolution #89-06-130. It is estimated that this number of REC's should be sufficient to last until late 1993 when the new treatment plant is completed. A concern in the 1989 Metropolitan Council review was that the City was not diligently requiring connection to City sewer when it becomes available within the urban area. Ordinance #89-25, adopted September 26, 1989, clearly defines when sewer becomes available to a parcel. The City is also considering the revision of the current Code in relation to the way in which hook-up to City services is required and enforced. With the additional changes in these requirements the City should experience additional single family hook-ups in the future. Sanitary Sewer Plans The City is currently reviewing wastewater flow projections through the year 2010. This will be incorporated into the plan as a separate element upon completion. One of the major considerations, however, is that Ramsey's wastewater flow be monitored to more accurately determine flow.