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<br />Engineer: Plowe, Lino Lakes <br />Submittal: Plans, Drainage Calculations <br />Plan Sheets: Grading and Drainage, Preliminary Details <br />Date of Plans: 11-27 -06 <br />Date Received: 11-30-06 <br /> <br />Summary of Recommendations <br />The approximately 7.4 acre development site with one existing home is located east of Clear Water Creek <br />along Old Mill Road in Centerville. The reconstructed area of Old Mill Road and a portion of the site in the <br />north west quadrant are proposed to drain to an infiltration basin which drains to the existing wetland west <br />of the site. The remainder of the site is proposed to drain directly to the wetland. <br /> <br />Based on our review of the Hanzal development, we offer the following comments. Some of the <br />recommendations were discussed in a telephone conversation on 12-01-06. <br /> <br />1. Storm sewer calculations should be included with future submittals <br />2. Grading around the baffle weir should be adjusted to prevent flow around the weir. Clarification <br />of the baffle weir detail is necessary. <br />3. Although not required, a small infiltration basin or other BMP is recommended adjacent to the <br />wetland mitigation area west of lot 3 to treat the impervious areas from lots 3 and 4 before <br />entering the wetland. <br />4. The infiltration basin is sized to adequately treat the runoff from the 1" event from the impervious <br />surfaces from Old Mill Road which meets City and MPCA NPDES requirements. It was <br />assumed that roughly 710 feet of Old Mill Road from the south end of the Hanzel property and <br />including the parcel north of the Hanzel property with an urban section 36 feet wide would be <br />routed to the infiltration basin. <br />5. Soil borings should be included in future submittals. <br />Bonestroo, Rosene, Anderlik and Associates, Inc. <br /> <br />www.bonestroo.com <br /> <br />51. Paul Office: <br />233~ w~~ H:g~WJ1 35 <br />s: P::1L:!, ~.~~l ~51~:1 <br />PIlene: 651-636-4600 <br />r~r' fi51-6:u\.1111 <br /> <br />Milwaukee OffIce: <br />12075 N. Corpora" Parkway. Sle 200 <br />~/eG~:n, WI 53092 <br />Phone.lbl-b4HeJI <br />,., 262-2Jl-4901 <br /> <br />Rochnter Office: <br />112 7" St...l NE <br />Rrx;tleSler. \IN 5590S <br />PIlOfle: ;Qf.2e2-2100 <br />F., 507-282-3100 <br /> <br />Willmar Office: <br />205 5" S~reet SW <br />Will'T':3', '.ltl.! 51:201 <br />pnone: 3:i()..2i4.S1,,,7 <br />F., 320-21J.9458 <br /> <br />St. Cloud Office: <br />3721 23~ S.eel S <br />~t C'0'.~. MN :ki}Ol <br />HlOrIe. jLtI.,,'-4~OJ <br />Fax. 320-251-6252 <br /> <br />libor1yVdl< Office: <br />1RfiO WP.~1 Winchester Rd. Ste 106 <br />Gr~Y"I~h." fi(i(l10 <br />;'''O(l~ 04;.54t)ooii4 <br />Fd': 8J7-548-697S <br />