12/04/2002 Env Bd Packet - Laserfiche WebLink

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ENVIRONMENTAL BOARD MEETING OCTOBER 30, 2002 Mr. Marier noted that for Wetland B the ponds would not hold the water that was only three feet deep and drains into an open ditch and into the lake. He predicted erosion problems. This needs to be addressed in the EAW. • Page 10, Section 12 under the Avoidance and Minimization of Wetland Impacts: O'Connell stated that it was inadequately addressed. Grundhofer added the area was degraded, and that it should be made better. Asleson indicated that the soil had clay so the soil'structure and any infiltration presently on the site could be easily destroyed. To prevent that, it helps to pull a ripper behind the equipment that is grading. It would take 100 years or more to restore the soil if restoration practices or preservation practices were not used. It would not cost any more money. A sequencing plan should be added as stated with the Best Management Practices. Schneider noted in the County Ditch System section that the tile system was very important to the adjacent owners. Asleson indicated that a surface water systems train should be better addressed for the impervious parking. They needed to analyze the hydrological changes that could occur. Chair Kukonen added that they needed staff comments. Asleson stated that there was no description of the surface water volumes before and after, or where the volume was going. Mr. Kevin Lawrence noted that there would be an overflow from the impervious to the mitigation pond, because the distance between them was not large enough. Asleson stated that the design of the Surface Water Management appeared confusing, and that the statement concerning discussions with the watershed district about drain tiles is inaccurate. In particular, that the existing drain tile alignment will remain in place or be replaced with new tile, and that this procedure is endorsed by the Rice Creek Watershed District. Mr. Marier cited a utility ditch to the drainfield location would be three feet over the high water level, and needed to clarify plans for mitigation. The water could rush over the berm into the lake. Donlin referred to Section 13, that at peak times, there could be 4,200 gallons released for 4,000 people. The project would need MUSA, not a septic system. Ms. Bor added that it would not only be on Sunday morning but there would probably be other programs and other uses. DRAFT MINUTES