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:.5 <br />To:Chairman Kelley and Planning Commission Members <br />Mayor Peterson and City Council <br />Ron Moorse, City Administrator <br />From:Jeanne A. Mabusth, Building & Zoning Administrator <br />Date:February 13, 1992 <br />Subject: #1715 City of Orono, 2700 Town Hall Road - <br />Conditional Use Permit/Variance - Public Hearing <br />Pertinent Ordinances - <br />Section 10.55, Subdivision 8 -- Variance. Land alterations <br />are proposed within designated wetlands classified as a Type <br />2. Alterations of Type 2 wetlands do not require approval <br />or peimits from DNR or Corps of Engineers. <br />Section 10.03, Subdivision 19 - Conditional Use Permit. <br />Land alterations involve grading and filling activities in <br />excess of 100 cubic yards. <br />List of Exhibits - <br />A - Plat Map <br />B - Property Owners List <br />C - Field Notes from Site Inspection (Steve McComas, <br />Limnologist) <br />D - McComas Report 2/3/92 <br />E <br />F <br />G <br />H <br />Option 1 - Three Detention Ponds <br />Option 2 - One Detention Pond <br />Designated Wetland as Shown on Final Plat <br />Designated Wetland as Shown on Preliminary Topographic <br />Plan <br />Review of Application <br />The City of Orono grading and drainage plans for the City <br />facility site are currently being reviewed by the Minnehaha Creek <br />Watfeirshed District. The Watershed District has advised that <br />detention must be provided on site to maintain exiting drainage <br />at property's current undeveloped condition. This was already <br />noted during the preliminary subdivision review. Review Exhibits <br />g and H. Drainage leaves the property at the east lot line at <br />1016.6 elevation. The iOO year storm elevation was determined to <br />be at the 1018. The overflow outlet to the northeast is at the <br />1017.9 elevation. Note drainage easement was not taken to the <br />northeast at the time of the platting. A drainage easement shall <br />be taken over overflow drainageway exiting at the 1017.9 <br />elevation. The entire 25+ acre watershed has been designated on <br />the drainage plans (Exhibits E and F). Note there still is no <br />change proposed for drainage facility carrying drainage from <br />Orono School complex to the western border of the City property. <br />Drainage still fans out over existing terrain to low retention <br />areas on property and will remain as such until biking and hike <br />trails are installed along the western boundaries of property. <br />'"'.j <br />h <br />4 <br />m. <br />■ V