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_ . ►� -i <br /> -_ �Bonestroo <br /> Rosene <br /> ��O �Anderlik& <br /> ,u,Assocfates <br /> Enginecrs 6/lrchllects <br /> Project Name; 3848 North Shore Drive, Fritz Clienf: 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 /> Comments/Recommendations <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 well-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 /> http://clean-water.uwex.edu/pubs/raingarden/rgmanual.pdf <br /> 2. Proposed rain garden locations and grading should 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 infi(tration 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 wil( result in reduced costs for the owner. . <br /> Bonestroo,Rosene,Anderlik and Associates,/nc, wuvw.bonesfroo.com <br /> ❑SL Paul Olfice: 0 Mllwauhea OHlce: ❑Rochester Otfice: O Willmar OHica: 0 S�Cbud ONlce: . ❑Ubertyvllle OHlce; <br /> 2J35 Y�esl Highv�ay 3fi 12075 N.Corporale Parkr�ay,Sle 200 112 7�SUeel NE 205 Sth SUeelSW J72123"SUeel S 18fi0 We�l Nfinchesler Rd,Sle 106 <br /> SL Paul,P.4N 55113 Mequon,Wt 57092 Rahesler,MN 55906 VJOlmar,PAN 56201 SL C{oud,MN S6J(11 Grayslake,Il 60030 <br /> Phane:fi51•636•4600 Phone:262•64}4DJ2 Phone:507•282-2100 Phone:J20•214•9557 Phone:J20-251-455� Phone:847-54&677A <br /> Fax:651•67Cr1311 Fax:262•241•4901 Faz:5�7•282•3100 Faz:)20•21A-9A58 Fas:�20-251•6252 Fax:e47-548•6979 <br />