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LRRWMO Meeting Minutes January 20, 1994 Page 6 Jankowski read the Engineer's recommended alternatives as follows: Alternate i) Construction of a .43 acre sedimentation pond Alternate 2) Street sweeping maintenance agreement Following a discussion of possible ponding locations, Brandenburg stated they prefer Alternative 2. He explained the park will not be open during the winter months, only from April 1st to November 1st, so they do not anticipate sanding of streets. He pointed out that the only location they would be able to build a retainage pond would be in the naturally wooded azea. He also expressed concern with the initial cost for constructing storm drains, piping, and ongoing maintenance costs. He pointed out they will have to sweep the parking lot even if the pond is constructed to reduce the amount of litter getting into the system. Haas questioned the erosion control plan. Brandenburg explained the MWCC had to install a black silt fence as part of their project which will remain during construction. Weaver pointed out the Engineer is recommending approval of the permit contingent upon the applicant accepting one of the recommended alternatives and that site erosion controls are maintained throughout the project. He commented he is comfortable with either alternative but thinks this property will drain naturally. Jankowski stated his preference for Alternative 1 (construction of sedimentation pond). He commented that it may become cumbersome to monitor a maintenance agreement which requires sweeping the pazking lot at least twice per month, picking up trash and debris weekly, etc. Jankowski pointed out that creating the suggested sedimentation pond will eliminate the reporting and review process. Haas stated this is a good point and agreed that installing a small skimmer will solve a lot of problems. He explained that the Coon Creek Watershed District would require a skimmer in the pond area since the water could eventually drain into the River. Schultz pointed out that the proposed pazking lot is considerably less than an acre in size. He felt the erosion control fences would be a larger concern. Jankowski commented that litter will end up somewhere whether a sedimentation pond is installed or not; however, sweeping will minimize maintenance of the entire area. Brandenburg agreed they will have to sweep either way. He pointed out that a natural sedimentation pond exists now with the wooded area, and expressed concern with the cost of constructing several catch basins plus piping. Weaver noted that the Engineer designed this plan with the question of water quality in mind. He commented on the impact that artificially constructed drainage facilities will have on the natural features of this pazk.