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+!■rr <br />/ < <br />...'1=1 <br />^ kfl <br />Penult Application Wo, 89-13S <br />Ownert October 13, 1989 <br />Locationi <br />Project* <br />Welters Port Legoon Association <br />2699 Kelly Avenue <br />Excelsior, MN 55331 <br />City ol Orono, Sec. 21BC, Carman Bay, Lake Minnetonka <br />Dredging to remove 900 cubic yards o£ material from a a mmon user <br />channel and cove, repair an existing sea wall and Install a 15 foot <br />boulder jetty. <br />Applicable Rules* Rule E <br />Rule F <br />Dredging <br />Shoreline Improvement <br />It >its Reviewed* <br />1. <br />2. <br />3. <br />4. <br />5. <br />6. <br />7. <br />8. <br />9. <br />Permit Application No. 89-135 received August 7, 1989. <br />Site plan received August 7, 1989. <br />Structural analysis for the retaining wall received August 7, 1989. <br />Cross sections and elevation of the retaining wall received Aug. 7, 1989. <br />Letter from the DNR to the applicant dated August 8, 1989. <br />Letter from the District to the applicant dated August 30, 1989 informing him <br />of the BocU'd action on August 24, 1989. <br />Sur-/ey of the lagoon area dated October 4, 1939. <br />Dredging plan received September 19, 1989. <br />Volume computations of spoil to be removed received September 19, 1989. <br />Staff Review Summar-/1 <br />The project involves dredging to remove approximately 900 cubic yards of material <br />from a common user channel and lagoon area adjacent to Carman Bay, Lake <br />Minnetonka in the City of Orono. The applicant also proposes to rebuild an existing <br />wood sea wall along the west side of the lagoon, and place a boulder jetty extending <br />from the west edge of the channel, 15 feet into Lake Minnetonka. <br />In the past, the Board has not allowed the construction of a jetty projecting Into <br />Lake Minnetonka to prevent the migration of sand. The Board reviewed two permits <br />in August 1988, Nos. 88-106 and 88-107, proposing the construction of a rock jetty <br />for this purpose. During that review, the applicant suggested that the problem <br />appeared to occur only during low lake levels, such as have been present on Lake <br />Minnetonka for the past few years. District staff recommends removal of this portion <br />of the project because it does not meet District standards for shoreline improvements <br />and would set a precedent for placement of fill in Lake Minnetonka to alleviate a <br />temporary problem caused by low water levels. If the applicant believes that this <br />will be a continuing problem, it Is recommended that he monitor movement of <br />sediment along the shoreline for several seasons to determine the effect of lake <br />elevation on the lateral drift of sediment. A 15-foot wide bottom width channel is <br />proposed. The bottom depth is to be 923.6. <br />8 of 21 <br />S- <br />tI