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<br />Parks & Recreation Committee <br />Meeting Minutes April 2, 2008 <br /> <br />In Attendance: Chairperson Suzanne Seeley, Vice-Chairperson Kevin Amundsen, Parks & <br />Recreation Committee <br />Tom Lee, City Council Liaison <br />Mark Statz, City Engineer - Bonestroo <br />Paul Palzer, Public Works Director <br />Greg Thompson, Anoka County Conservation Department <br /> <br />Rain Garden <br /> <br />· Mr. Thompson suggested using an apparatus that measures soil compression to help determine <br />if the soil layers beneath the rain garden are porous enough to permit appropriate drainage. He <br />mentioned that even if the soil composition is good, heavy construction equipment can <br />compress the compost/sand/soil mixture to the point where it won't drain well. He has the <br />equipment and is willing to come back after the ground has thawed to measure it for us. <br /> <br />· We also talked about testing the drainage by opening up the fire hydrant, measuring the water <br />as it fills the rain garden, then timing the absorption rate. The Rice Creek Watershed District <br />can supply us with the number of gallons that would be equal to a 2 inch rain and the amount of <br />time it should take to drain. <br /> <br />Shoreline Erosion <br /> <br />The following were the suggestions made by Mr. Thompson: <br /> <br />· Install new, sixteen inch bio-Iogs adjacent to the shoreline. <br /> <br />· Use a double or triple layering of snow fencing to stop wave action. <br /> <br />· Re-establish plantings in the bio-Iogs and for three feet immediately behind the bio-Iogs (in the <br />transition zone) to eighteen inches above the average water level. <br /> <br />. Use a mix of 75% lake sedges and 25% wild flowers. <br /> <br />· Prairie Cord Grass is highly recommended and would provide a better viewing ofthe lake. <br /> <br />· Rather than using rock on the north side of the shoreline where the steepest drop off is, place a <br />"rock log" (which is river rock rolled in chain link fencing) and anchor bio-Iogs to it. Use a C- <br />125 erosion control blanket to cover (encase?) the 16" bio-Iogs and plant heavily with the <br />previously mentioned plantings. Place branch bundles with dirt fill where erosion has taken <br />place. <br /> <br />· Also, without the additional cost of purchasing rock, there should be no additional cost to the <br />city to correct the shoreline. <br /> <br />30f6 <br />