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LRRWMO Meeting Minutes December 21, 1995 Page 5 OLD BUSINESS LRRWMO #95-22 -Anoka Municipal Utility Power Line Jankowski reviewed the memorandum from Bob Obermeyer indicating he recommends approval of LRRWMO Permit #95-22, Anoka Municipal Utility Power Line, subject to two conditions regarding erosion control measures and that the transmission towers must be located outside of the limits of the designated wetland areas along the proposed alignment. No action necessary; approved at November 16, 1995 meeting subject to Obermeyer's recommendations. NEW BUSINESS LRRWMO Permit #95-23 -Anoka Reeaonal Treatment Center -Anoka Jankowski noted that a memorandum has been received from Bob Obermeyer indicating a retention basin is to be located in the southwest comer of the site and he has reservations regarding the construction of any structure adjacent to a basin that does not have a low level piped outlet. Therefore, he recommends action on this permit be tabled until this issue has been resolved. Bob Weigert, developer's consultant, reviewed the proposed plans to construct an addition to the Anoka Metro Regional Treatment Center in Anoka, drainage patterns, discharge rates and treatment of storm water. Weigert explained he proposed the southerly pond to be a retention pond with no outlet but the outlet to be the permeability of the soils. Also the pond is sized for two one-hundred- year events but Obermeyer's concern is that the drainage way has a potential to impact some existing homes. Weigert stated that if the pond were to fill, the water would meander through the buildings and drain into the River. It was noted that Obermeyer's recommendation is to address it further or to install a storm water system from the southerly pond down to the storm sewer in Grant (1,250 feet in distance). If done, Weigert stated he would probably use PVC and run it along side the existing sanitary sewer. He estimated the cost to be in the range of $30,000. Schultz stated his additional concern is the need to review a design for a sanitary sewer and lift station which may need to be located in the area of the proposed pond. He pointed out the need to avoid a potential future conflict with the sanitary sewer lift station. Weigert explained his firm is only involved in creating a drainage plan (not a sanitary sewer plan) but he will relayed this concern. He explained that the pond location can "float" or