11-22-1999 Council Work Session - Laserfiche WebLink

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I I I r r I I I I } I EXISTING SEWAGE TREATMENT FACILITIES Sewage collection and treatment in Orono is accommodated by three separate "systems". Rural Orono is served by individual on-site sewage treatment facilities. Urban Orono is served by a municipal sanitary sewer collection system.•The Metropolitan Waste Control Commission Councjl Environmental Serv ices operates an interceptor sewer system which receives flow from municipal sewer systems in the Orono, Long Lake, Maple Plain. Medina and Minnetonka Beach munivipal systems. METROPOLITAN FACILITIES I The Metropolitan Waste Control Commission owns, operates and maintains interceptor sewer and treatment facilities in Orono as indicated on Map No. 9; in Figure FORMER ORONO TREATMENT PLANT The now defunct Orono Sewage Treatment Plant was constructed in 1964 and was intended to be the only treatment facility for urban Orono. The plant is was located on the west shore of French Lake near County Road 84. The plant includes provided primary and secondary treatment equipment pins followed bv an activated sludge tertiary’ treatment settling pond. Effluent discharges discharged into French Lake which in turn ou tlets outletted into Crystal Bay of Lake Minnetonka, from 1964 until 1980 . The Orono plant was orig inally designed to serve approximately 4 ,000 persons with vApavit> to treat an average flow of .40 mgd. The plant receives all sewage flow Minnetonka Beach as well as flow from southern Orono. The plant has been operating at about 75-800fi capacity with a docume nted flow of .36 mgd. in 197 5 : The documen ted totol flow of 188 MG inl9 78 is equival ent to. an average flow of 357 g pm. At this treatment ute., effluen t df r> argeyha-. c conformed to aH quali t}’ standards except Pil: TV.e MWee assumed ownership and operation of the Orono plant as a metropolitan facilit>' in 19^. Upon completion and opening of the Orono-Long Lake Interceptor inoariy 1980, sewage processing at the Orono plant will be was discontinued. The depreciation'schedule of the original purchase agreement calls for owmership of the plant and g rounds to revert to the Cit> of Orono, without cost, ■It thp time pmee^sing ceases: Ownership ofthe plant and grounds reverted to the City of Orono, and it has been converted to park and natural open space use bv' the Citv. except for a small parcel which is the site of MCES Lift Station No. FORMER LONG LAKE TREATMENT PLANT The Long Lake Treatment Plant is considerably older than the Orono plant having served the City of Long Lake and a portion of northern Orono for many years. This plant is was located in Orono, just south of the Long Lake municipal boundary, on Orono Orchard Road. The plant includes provided primary treatment only, with settling pond effluent discharging into Long Lake Creek which m tu rn meanders through luial Orono before emptying into Tanagcr Lake and Drowns Day Lcjkc Milinctonkii. L CMP 6-32