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Sep 19 2005 8: 42 BONESTR00 ROSENE ANDERLIK 6516361311 <br /> p. 2 <br /> Mem o �Ro��� <br /> ������ <br /> Associates <br /> enyu,e�r:s�.o,rcecc: <br /> Project Name: Trinity Lutheran Church <br /> Client: City of rono <br /> To: Tom Kellogg . Fi/e No: 139-0 -000 <br /> F�om: Lance Hoff Date: 9-14-05 <br /> Re: Drainage Review <br /> Engineer: BKBM Engineers, MPLS <br /> Submittal: Drainage Calculations, Rational Storm Sewer Design Calc lations, Plans <br /> Plan Sheets: Grading and Drainage, Storm Sewer, Details <br /> Date of Plans: 9-6-05 � <br /> Date Received: 9-12-05 <br /> Sumrnarv of Recommendations <br /> Based on our review of the Trinity Lutheran Church site, we offer the followin comments. Grading and <br /> drainage are generally good. Rate control requirement has been met for the ite. The storm sewer has <br /> been adequately designed: The only comments are in regards to water quali treatment, which has not <br /> been addressed by the plans. Comments follow below: <br /> 1. The pond should be modified to include water quality treatment fo the entire site. Treatment <br /> should satisfy NURP requirements (wet volume equal to the runo generated during a 2.5" <br /> rainfall event). Our calculations show that 0.315 ac-ft of wet stora e must be provided. <br /> 2. A 10' wide aquatic bench with slopes no steeper than 10:1 must b provided immediately below <br /> the NWL. <br /> 3. The pond outlet structure must be modified to provide skimming. <br /> 4. The pond inlet and outlet should be separated as much as feasibl to prevent short circuiting. <br /> 5. The pond EOF should be shown as armored fo prevent erosion. iprap or properly installed <br /> permanent erosion control mat would be acceptable. <br /> Bonestroo,Rosene,Ander/ik and Assoc/ates,/nc. <br /> � www.bonestroo.com <br /> SL Paul Oftke: MHwaW�e Offlce: Rxl�sAer Offkc: Willmar Otflce: <br /> 2335 West FligArrsY� 12075 N.CorD«ete ParkwaY�Ste 2fq 112 7^�Streel NE 205 51h SVeet SW Cbud Otfice: LlbBrtyvl9e Offlce: <br /> SL Paul,MN 55113 MaQuon�WI 53092 Rxhester,MN 55806 3 23�Streel S 7860 West Winfiasler Rd.Sle 106 <br /> Plane:651-636-4800 Phone:282613-9032 �anar�MN 58201 SL bud,MN 56301 <br /> F9K:851�836-1311 Fax�282•241d80/ PhOn0:507-282-2100 Pha�e:320-214-8557 pho�ne 320-251-4553 �rayslake�IL 60030 <br /> Fax:507-28&3100 Fex:32p-214-g458 �_1-�o-�t�� Phone:847•548-6774 <br /> �°�f Fez:8{7-54&8878 <br /> . , :...`. � ..�.���:. ��.: , . .. . ' <br /> . . .. . . . .. ' �.:i�� :-, . . . . . � �. ::� �� . <br />