Comp Plan 1978-1980 FILE #2 - Laserfiche WebLink

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Brooklyn Park There is also adequate capacity in the interceptor system serving Brooklyn Park t_hrcug~' the end of the planning period. A few general comments regarding the existing metropolitan interceptor system is warranted. The interceptors serving Andover, Brooklyn Park and Maple Grove all. converge on the Minneapolis east interceptor. This sewer serves part of the combined sewer area in Minneapolis. Mirkneapolis in the past several years has been separating the majority of the combined sewers tributary to the Minneapolis east interceptor. However, ~here are still combined sewered areas which drain to the Minneapolis east interceptor. Du~inq the periods of rain or snow melt ~his sewer overflows combined sewage to the river. From ~te Minneapolis east interceptor flow goes through the joint interceptor. There are no overflows on the joint interceptor u/~til it reaches the treatment plant where all flows above the plant capacity are bypassed. By increasing sanitary sewage from future growth in this area will increase the amount of flow being overflowed or bypassed to the river and the strength of 'these Overflow~.- There- fore, for purposes of this study one of the alternatives being considered is to build a new treatment plant in Fridle¥ and locate the outfall below St. Anthony F~lls. This outfall location was chosen to.avoid a discharge to the Mirineapolis water supply intake. Preliminary model indication is that secondary treatment is adequate to meet water quality standards. The MWCC, as part of its 201 study, is looking at the whole question of combined sewer overflows. A final decision on the sever.ity of the problem or Se alternatives is not available. This report should be available in 1979 and the.results will be incorporated into the Waste Management Policy Plan at that tame. The preliminary results of the (AESOP) river model have shown that tertiary treatment at the Metropolitan Plant is needed to meet water quality standards. The AESOP model is a three dimensional model wh£ch has been calibrated as part of this study so load allocations for the treatment facilities on the river could be determined. A detailed discussion re- garding the findings of the model will be made in the study on modeling. The prelimiaa~f results of ~he model showed that the Metropolitan Plant e~fluent of 15 mg/1 BCD and 1.5 mg/1 anm~onia was needed to meet the proposed water quality standards.