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. V July 17, 1987 Clifford Recp 475-1816Shoreline and Development Consultant <br />“w». <br />16820 Edgewood Av. V\/oyzata, MN 55391City of OronoPlanning Commission & City Council <br />c/o Jeanne Mabusth. Zoning Administrator <br />P.O. Box 66 <br />Crystal Bay, MN 55323 <br />FvE: Smiths Bay Yacht Club; Conditional use permit for a shoreline seawall. <br />Members of Planning Commission and City Council: <br />mm <br />;s <br />I <br />I am writing this letter on behalf of the Smiths Bay Yacht Club regarding their <br />request for a conditional use permit for the construction of a seawall along the <br />shoreline of their property on Smiths Bay. <br />The Department of Natural Resources have approved the plans for construction of <br />the shoreline seawall, and require title registration of seawalls. I expect <br />this to be completed in the next few days. <br />The Minnehaha Creek Watershed has also approved the plans and will issue the <br />permit upon the receipt and approval of an engineers analysis of the structural <br />integrity of the wall. This analysis is now under progress. <br />The intent of the seawall is to provide a sharp interface between land and water <br />areas. This allows maximun use of the limited land area for parking and storage <br />purposes, and will allow watercraft to get close to the shoreline to utilize <br />the upland service areas and sewage pumping facilities. Rip rap, an alternative <br />to the seawall, requires more land area to allow for the slope from the parking <br />area to the lake bed, thereby reducing the effective use area of the facility. <br />The construction of a seawall allows the implementation of a water quality <br />filtering area by collecting and filtering surface runoff from the parking area. <br />The area behind the proposed wall will be lined with a filter fabric and back­ <br />filled with crushed limestone. Weep holes ara to be placed in the seawall to <br />accommodate drainage through the filter arei. A stipulation of approval from the <br />MCWD requires the rock backfill to be limestone, as the limestone has the capa­ <br />city absorb petroleum products. <br />Seawalls in general, provide greater protection from shoreline erosion than rip <br />rap. The Smiths Bay Yacht Club site is a non-natural feature of the shoreline, <br />as the site is made up primarily from fill material. Because the site projects <br />from the adjacent shoreline areas, the site would have a greater erosion poten­ <br />tial, and should be allowed to construct a seawall to obtain maximum erosion <br />protection.