Laserfiche WebLink
FT <br />• • <br />STATE OF <br />DEPARTMENT OF NATURAL RESOURCES <br />^RO WATERS - 1200 WARNER ROAD, ST. PAUL, MN 55J.06_^ <br />PHONE NO. 772-7910 FILE NO <br />. t <br />I <br />J 2 <br />November 5, 1992 <br />MOV 1 2 5sse <br />David Carlson <br />2400 Mayflower Avenue <br />Minnetonka, MN 55305 <br />• • <br />RE: CARLSON CABIN, BIG ISLAND, LAKE MINNETONKA (27-133P, #5) , <br />CITY OF ORONO, HENNEPIN COUNTY <br />Dear Mr. Carlson: <br />This letter is to confirm our discussion of September 28, 1992, <br />concerning the construction of a cabin on Big Island in Lake <br />Minnetonka (27-133P). <br />The building site is within the floodplain of Lake Minnetonka, i.e. <br />below the elevation of 931.5'. Therefore, the new cabin must be <br />conistructed with the lowest floor at or above the regulatory flood <br />protection elevation (RFPE), which is at least 932.5*. (Check with <br />the city of Orono on the minimum elevation; they may be more <br />stringent than the minimum state requirement.) <br />You indicated that fill would not be used to elevate the structure. <br />Therefore, the cabin must be securely anchored by a foundation <br />designed by either a certified architect or engineer which allows <br />vater to flow freely beneath the structure. <br />In addition to the points above, the following DNR concerns should <br />be noted: <br />The vegetation and topography should be retained in a natural <br />state in the 37.5' shore impact zone of Lake Minnetonka. <br />2.The ordinary high water (OHW) level of 929.4'(NGVD, 1929) for <br />Lake Minnetonka should be noted in future plans and plats. It <br />is not clear whether the shoreline indicated is at the OHW or <br />not. The 929.4' contour shoiild also be shown since that is <br />the critical elevation for building setbacks, limits of DNR <br />authority, etc. <br />3.^ppj-Qpriate erosion control measures should be * ..ken during <br />the construction period. The Minnesota Construction Site <br />Erosion and Sediment Control Planning Handbook (Board of Water <br />& Soil Resources and Association of Metropolitan Soil and <br />Water Conservation Districts) guidelines, or their equivalent, <br />should be followed. <br />AM EQUAL OPPORTUNITY EVPLOYER <br />MU