11-22-1999 Council Work Session - Laserfiche WebLink

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As with the Orono plant, the MWCC assumed o\M)cr3hip and operation of the Long Lake Plant around 1970. Prior to 1980 the Long Lake Plant operated at over capacity for approximately 5 years. Upon completion and opening of the Orono-Long Lake Interceptor, this plant too wtH bc was phased-out and the land returned to local control, except for a small parcel which is the site of MCES Lift Station No. . The grounds, owned b\ the City of Lone Lake, were annexed from BLUE LAKE TREATMENT PLANT All sewage outflow from Orono will eve ntually be is conveyed to and treated at MW'CC's MCES's Blue Lake Treatment Plant on the Minnesota River in Shakopee, which was expanded in 1993 to increase its design capacity to the current level of 38.0 mad to meet the advanced secondary treatment standards imposed in its NPDES operating permit. According to Orono’s System's Statement, the Blue Lake Plant is currently operating at about 50% of its ultimate 20 mgd. approximately 75% of its ultimate capacity, and is expected to be adequate until approximately 2009. at which time further expansion will be necessary under current growth projections. Orono's sewer service capacity is limited by the capacity of the intervening interceptors including the Orono- Long Lake Interceptor, and not strictly by the capacity of the Blue Lake Facility. idc! ORONO-MINNETONKA BEACH INTERCEPTOl ’ The Orono-Minnetonka Beach Interceptor (MCES designations 6-OR-641 and 8567) delivers sewage flow from Minnetonka Beach and southern Orono to MCES Lift Station 59 at the site of the farmer Orono Treatment Plant. Most of the interceptor line was constructed in 1964 as part of Orono's original municipal sewer project, although future capacity was even then provided by Orono for Minnetonka Beach. Reconstruction and minor reconfiguration of portions of the line occurred in 1985 (project 85-67L EDIT / UPDATE / CORRECT THE FOLLOWING 3 PARAGRAPHS The original line runs principally along County Roads 19 and 31 from the Navarre Area to the treatment plant on French Lake LS-59. The construction of this line consists of segments of 10", 12", and 15" vitreous clay pipe interspersed mth five segments of 8" cast iron force main. This line includes service stubs to properties along all gravity' segments. The remaining portion of the Orono-Minnetonka Beach Interceptor was constructed in 1966 CMP 6-33