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� �� <br /> I�'Bonestroo <br /> ��Rosene <br /> ��o �Anderlik& <br /> Associates <br /> Englneers 6 Architeces <br /> Projecf IVame: 3848 North Shore Drive, Fritz Client; City of Orono <br /> Addition <br /> File No: 139-05-000 <br /> To: Tom Kellogg <br /> Date: 12-30-05 <br /> From: Lance Hoff <br /> Re: Drainage Review <br /> CommentslRecommendations <br /> Based on our review of the 3848 North Shore Drive development, we offer the following <br /> comments. <br /> 1. Rain gardens are an efficient, cost-effective way to increase infiltration and control flow <br /> rates from the proposed site due to its small size and weli-drained soils. One example of a <br /> helpful resource for rain garden design is available on the internet from the University of <br /> Wisconsin Extension Service at: <br /> htfip://clean-water.uwex.edu/pubs/raingarden/rgmanual.pdf <br /> 2. Proposed rain garden locations and grading shouid be clearly indicated on the grading and <br /> site plans. The rain gardens should be placed so as to primarily receive runoff from roof, <br /> driveway, and road drainage. Swales can be used in order to direct runoff to the proposed <br /> rain gardens from these impervious areas. <br /> 3. Proposed outlet pipes and any other storm sewer utilities indicated in the modeling should <br /> be clearly indicated on the grading and site plans. <br /> 4. The submitted modeling did not include infiltration. The modeling should be revised to <br /> include estimated infiltration rates ( eg. 0.5 in/hr for Type A Soils, 0.25 in/hr for Type B <br /> Soils, etc.,.) <br /> 5. The modeling shows orifice plates directly connected to larger diameter outlet pipes. This <br /> is generally not an acceptable practice within the City of Orono. It would be preferable to <br /> use smaller diameter pipe which will result in reduced costs for the owner. <br /> Bonestroo, Rosene, Anderlik and Associates, Inc. www.bonestroo.com <br /> ❑Sl.Paul OKce: 0 Milwaukee OHice: ❑Rochesler OKce: ❑Willmar ONfce: Q Sl.Cloud OHice: ❑Liber!yville OHice: <br /> 23J5 9/est Hi9hway J6 12075 N.Coryorale Parkway,Sle 200 112 7'"SVeel N[ 205 SIh SVeel SW J721 27"Streel S 1860`Plest'Plnchesler Rd,Sle 106 <br /> SL Paul,PdN 55113 Mequon,N/l 53092 Rochesler,MN 55906 V�lillmar,PAN 56201 SL Cloud,IvIN 56301 Grayslake,IL fi0070 <br /> Phone:651�6J6�A600 Phone:262�6A}40J2 Phone�.507-282-2100 Phone:320-214-9557 Phane:320�251-4557 Phone:84'/�548-677A <br /> Fax:651-63G1311 Fax:262-241•4901 fax:507�282�3100 Fax:320�2149A58 Faz�.720-251-625Z Fax:847-543�G979 <br />