02-11-2019 Council Packet - Laserfiche WebLink

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CMP Part 4B. Sanitary Sewer Plan City of Orono Community Management Plan 2020-2040 Part 4B, Page 3 EXISTING SANITARY SEWER SYSTEMS Land Use Historic development patterns have resulted in a city which is partially urban and partially rural. The citizens of Orono have decided that a long range planning objective of the City is the permanent retention of the rural community. This objective is in line with the existing developed density of the area, with the similar plans of other cities abutting the rural area, and with the legislative intent of metropolitan planning such that expensive urban services not be over extended into undeveloped areas. Sewering of the urban area is necessary. The character and historic density of land use in the existing urban area of Orono, coupled with its general proximity to Lake Minnetonka both required and economically justified the installation of sanitary sewer to alleviate existing health and environmental problems. Rural lakeshore areas within the Shore land and within the Metropolitan Urban Service Area (MUSA) have been provided with municipal sewer service upon request. Residences, existing or proposed within the designated Shore land Overlay District and within the MUSA for which municipal sewer service was requested were and shall be provided with municipal sewer. However, this policy will not preclude development of such areas using fully conforming Individual Sewage Treatment Systems. Metropolitan Council Facilities The Metropolitan Council Environmental Services (MCES) owns, operates and maintains interceptor sewer and facilities in Orono as indicated in map 4B-1. The Orono system is serviced by MCES meters; M431 and M435. Sewage flows from southern Orono are metered at MCES Meter M435. Flows from north central Orono are metered at MCES Meter M431. MCES maintains six lift stations within Orono; L44, L45, L46, L49, L59 and L60. All sewage outflow from Orono is conveyed to and treated at MCES's Blue Lake Treatment Plant on the Minnesota River in Shakopee. 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. A history of the MUSA expansion can be found on Map 4B-2. Orono Sanitary Sewer System The City of Orono owns, operates and maintains municipal sanitary sewer facilities as indicated on Map 4B-3. Orono’s sanitary sewer system currently consists of approximately 245,131 ft of Sewer Main, 80,530 ft of Force Main, 1292 Manholes and 44 lift stations, of which a majority was built within the last 50 years. The City of Orono’s existing Sanitary Sewer System limits are defined by the boundaries of the MUSA. Because of topography and historic development patterns, the Orono municipal sewer system includes a number of disconnected sections which can be categorized into 5 distinct service areas. In addition the topography of the area has resulted in the City constructing 44 Lift Stations. 1. Southwest Orono System(MCES metershed M435): This system consists of two sub systems; the Lift Station 59 system and the downstream interceptors system. The Lift Station 59 system consists of all lines which are upstream from and ultimately discharge to MCES Lift Station #59