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if- <br />^ , ■>< ' ^ 'tr <br />Bl.-; <br />mp <br />“X <br />t.fe, <br />•r^ '^'V •^V,.r; <br />f,Vi. <br />tf. <br />>■*' i.h'- <br />'^^:■ <br />/.vA*. <br />BIVy?- <br />f’"' ■•• f • •' <br />COFFIN A GRONBERG. INC. sunvcvmo. moMinmo ano land piannimo««a-A TAMANACK AVCNURLOHO LAKE. MINN. SSSS* <br />4T3-414I <br />3-9-92 <br />City of Orono <br />P.O. Box 66 <br />Crystal Bay, MN 55323 <br />Attn: Jeanne Mabusth <br />RE: AL HANSER SUBDIVISION <br />Dear Jeanne: <br />Last fall when the water level was q'..ite hi:h, we shot elev <br />ations on the easterly Hanser we*-lands and found that the water <br />level was at 932.3. On February 2’, 1992 when the culvert under <br />the railroad tracks was being unplugged, the water level had <br />risen to 932.5 while the wetlands to the south of t.ne tracks <br />was at 931.2. Today, the wetlands to the south has drained down <br />to 930.8 while the^Hanser wetlands is at 932.1. Thus, with the <br />culvert currently working, the water level in the Hanser wet­ <br />lands has dropped 0.4 feet and will continue to drop. <br />The overflow, which could be lowered, is in the north ditch <br />of the railroad tracks at 933.0 at which point water would flow <br />west to the Tanager Lake wetlands. <br />As shown on the enclosed road plan, even usinq the high <br />932.3 elevation (the 10U year Lake Mtka. flood plain elev. is at <br />931.5) allows more than enough room to construct a roadway along <br />the present driveway and still meet the setba-'^'^ requirements. <br />If you have any other questions, please contact me. <br />Sincerely, <br />COFFIN 6. GRONBERG, INC. <br />Mark S. Gronberg <br />m