06-28-1999 Council Minutes - Laserfiche WebLink

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ORONO CITY COUNCIL MEETING • MINUTES FOR JUNE 28, 1999 ( #11) MOONEY LAKE OUTLET Gappa stated the City was requested last year to petition the MCWD to complete a feasibility study for this project. The feasibility study has been completed by Bonestroo Engineers. Because the lake does not have an outlet, there is a concern about rising water levels in the lake. High water elevations have been causing damage to trees, yards and landscaping. Approximately 200 trees are in danger at this time. Gappa indicated the feasibility study has identified four options, with City Staff preferring Option 1. Option 1 includes a pumping station on Dayton's property with piping south and east to the County Road 6/North Ferndale Road intersection. A connection would then be made to the new storm sewer system in North Ferndale Road. This system drains into Hadley Lake, then south through Wayzata. Gappa stated the recommendation is that the lake elevation be allowed to fluctuate between 987 and 988. It is estimated that beginning at elevation 988 pumping would be necessary every three to five years. To reduce downstream impacts, the pumping rate would only be one cubic foot per second and would be limited to off peak conditions. At one cubic foot per second, after 60 to 70 days of pump operation, the lake elevation would be lowered by one foot. Gappa stated the other options identified in the feasibility study are not feasible. The main consideration for this option is that this project has only local benefits or larger watershed district • system benefits and does not have any water quality benefits for other water bodies within the district. 9 Kellogg stated this issue has been incorporated into the construction of Ferndale Road. Gappa stated an agreement will need to be worked out as to when pumping will commence and stop. Dayton indicated he has been regularly losing trees and that this hopefully will help save the tree line along the lakeshore. Dayton indicated he is willing to accommodate this project. Gappa stated funding for this project also needs to be worked out, with one option being to assess the costs. City Staff feels if it is assessed, the assessment should be assessed to all of the properties in the drainage area. Peterson moved, Kelley seconded, directing City Staff to notify the Minnehaha Creek Watershed District that the City of Orono would like to proceed with Option 1 as outlined in the feasibility study completed by Bonestroo & Associates. VOTE: Ayes 5, Nays 0. Kelley indicated he would like the MCWD to do the annual maintenance on this project. Page 17