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t <br /> QUAM ENGINEERING, LLC <br /> Viewarligimagg a.- <br /> Residential and Commercial Site esign Consultants <br /> May 26, 2015 <br /> III <br /> Dane County Water Resource Enginleering Division <br /> Attn:Jeremy Balousek <br /> 5201 Fen Oak Drive,Room 208 <br /> Madison,WI 53718 <br /> Re: Premier Co-op Grain Bin(201 ) <br /> Dear Mr.Balousek, <br /> The Premier Co-op site is located at 10 16 Highway 14,Town of Mazomanie,Dane County. <br /> The existing site consists of multiple a 'cultural buildings,gravel drives,detention pond, and <br /> bio-retention device.The proposed red velopment includes construction of an 8,659 square foot <br /> grain bin at the southeast corner of the$ite. Enclosed are the following documents for review. <br /> 1) Grading and Erosion C ntrol Plan; <br /> 2) Universal Soil Loss Eq tion(USLE)worksheets; <br /> 3) Ditch Velocity Calcula ions; <br /> 4) WDOT Erosion Mat C lculations; <br /> 5) Cost Estimate; <br /> 6) Dane County Erosion Control and Stormwater Management Applications, <br /> Checklists, &Fees; <br /> The erosion control measures and storm water management system for the proposed <br /> redevelopment will meet the following performance standards as defined in the Dane County <br /> Ordinance as follows: <br /> Erosion Control <br /> The proposed construction shall inclu a erosion control measures to prevent gully and bank <br /> erosion and limit total off-site erosion less than 7.5 tons per acre per year. <br /> All runoff during construction shall be • ected to flow through erosion control measures as <br /> shown on the Grading&Erosion Contr 1 Plan. The USLE worksheets indicate soil loss will be <br /> less than 7.5 tons per acre per year. <br /> II <br /> Sediment Control <br /> For redevelopment resulting in expose surface parking lots and associated traffic areas, the <br /> applicant shall design the storm water anagement measures to retain soil particles greater <br /> than 20 microns on the entire site(40° reduction) resulting from a one-year 24-hour storm <br /> event, according to approved procedur s,and assuming no sediment resuspension. <br /> The proposed redevelopment consists o a building that will produce"clean"runoff. Therefore, <br /> sediment runoff is expected to be mini <br /> rla <br /> 1 and no sediment controls are proposed for this project. <br /> I <br /> 4604 Siggelkow Road, Suite A • McFarland, Wisconsin 53558 • www.quamengineering.com <br /> Phone (608) 838-7750 ` Fax (608) 838-7752 s E-mail rquam @quamengineering.com <br />