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. � r � <br /> �Bonestroo <br /> Mem o »Rosene <br /> Anderlik& <br /> �Associates <br /> Enqlneert6 Ar[hl[ecn <br /> Project Name: 3500 Watertown Road Client: City of Orono <br /> To: Tom Kellogg File No: 139-05-000 <br /> From: Lance Hoff, Dan Murphy Date: 9-8-05 <br /> Re: Drainage Review <br /> Developer: Bohland Development, Inc. and James MacKinnon <br /> Engineer: Gronberg &Associates, Inc., Long Lake <br /> Submittal: Drainage Calculations, Plans <br /> Plan Sheets: Grading and Drainage <br /> Date of Plans: 8-17-05 <br /> Date Received: 9-6-05 <br /> Comments <br /> Based on our review of the 3500 Watertown Road development, we offer the following comments. <br /> 1. Rational method storm sewer calculations should be submitted for review and approval. <br /> 2. A pond outlet detail should be included on the plans and submitted for review and approval. <br /> The submitted model includes an outlet, though the design is unclear. An outlet should be <br /> � properly designed and clearly shown on the plans. <br /> 3. The City's standard skimming pond outlet shoufd be used (detail attached). <br /> 4. Offsite drainage from the southwest and southeast should be accounted for in the drainage <br /> calculations. <br /> 5. The pond emergency overflow (EOF) elevation should be labeled on the plans. The EOF <br /> elevation should be located at or above the 100-yr HWL. <br /> 6. The top of the pond berm should be labeled on the plans. The top of berm elevation should be <br /> no less that 1' above the 100-yr HWL or the EOF elevation, whichever is greater. <br /> 7. The contour elevation labeled "998" east of the existing house and west of the proposed <br /> McKinnon Drive should be labeled "1002". <br /> Bonestroo, Rosene,Anderlik and Associates,Inc. www.bonestroo.com <br /> 0 Sl,Paul OHke: ❑Mllwaukee OHlee: p Rochester OHlce: ❑Wlllmar Oftlee: 0 SL Cloud Ofllce: ❑Llberlyvllle Offlce: <br /> 2335 Wesl Hlghway 36 12075 N.Corporala Pxrkway,Sle 200 112 T'Strael NE 205 Sth Stree15W 3721 23'"Streel S 1860 West Winchester Rd,Ste 108 <br /> Sl Paul,MN 551�3 Mequon,WI 53092 Rachester,MN 55906 WilYnm,MN 56201 SI.Cloud,MN 58301 Greyslake,IL 80030 <br /> Phona:651�38-4600 Phone:262843•9032 Phons:507•282•2100 � Phone:320•2149557 Phone:320-257•4553 Phone:B47•548•8�74 <br /> Fax:851�3&1111 Fax:282-241•4901 Fax:507•282•3100 Fax:320•214•9458 Fax:320-251-6252 Faz:847•548�8979 <br />