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' ^ ’ " Hm ' <br />mm >■ <br />1/ -TiJfy.' <br />>*u■': <br />rr <br />T9^a: <br />COFFIN & GRONBERG, INC. <br />SUnVBViMO. BNOtNOnNO AMO LAND PtANNiNO <br />4«a-A TAMAMACK AVBMU* <br />LONO LAiCe. MINN. OMM* <br />473-4141 ■£Av-;.4i-'•-. ■, <br />City of Orono <br />P.O. Box 66 <br />Crystal Bay, MN 55323 <br />Attn: Jeanne Mabusth <br />3-9-92 <br />'• RE: AL HANSER SUBDIVISik <br />iWB <br />¥i-•K f'Dear Jeanne: <br />m-Mmm <br />f-xi <br />4 U- <br />J <br />:i‘ <br />t • <br />, vr-' <br />JKc'v ' <br />'■km <br />Last fall when the water level was quite high, we shot elev­ <br />ations on the easterly Hanser wetlands and found that the water <br />level was at 932.3. On February 21, 1992 when the culvert under <br />m.iik the railroad tracks was being unplugged, the water level had <br />S|:; ."liJ <br />risen to 932.5 while the wetlands to the south of the tracksI <br />xi. <br />y fcr <br />wa.s 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 using the high <br />932.3 elevation (the 100 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 setback requirements. <br />If you have any other questions, p‘ <br />m; • <br />iu MMIctt “.V <br />li-’ <br />?•• v .A a w- <br />s <br />c luiKlsisiS MkA <br />y <br />M <br />' "'■'it- <br />J pi <br />p?r>4. '■• ■ <br />i-si <br />i <br />p':®; 'A--::- <br />■k-m <br />: . :»'.v ^■■■■ ' ■■ :r}t^ r <br />- a; <br />.rt'S-,'V <br />' ....4 , ' <br />a VV,:;X;X;:.X'ywm. <br />-y- 'O,.' <br />a X A v.y^-^r <br />m <br />1cr:ry^m <br />■ <br />- - V - ^W^M <br />i ■• ''Z 7 '