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JA <br />1EDLUND <br />Planning Er,;. ing Surveying <br />Kim Herman, City Planner December 14, 1987 <br />City of Mounds Viet+ <br />2401 Highway 10 <br />Mounds View, MN 55112 <br />Re: Mr. Jiro Cepress, Dynamic Designers <br />Dear Ms. Herman: <br />Encloseo is a map of the drainage area into Bronson Pond. The map <br />has been divided into land -use districts. Each district has a <br />unique nutrient loading runoff factor so a nutrient loading to <br />the wetland can be determined for each district. The following <br />calculations illustrate the nutrient loading and the assimilative <br />capacity of the wetland involved. <br />PRESENT USE FUTURE USE <br />Area Loading Area Loading <br />fAe1 (lbj.Ac/Yr) (Ael (ib/Ac/Yr) <br />Multiple 0.0 3.46 1.05 3.46 <br />Dwelling <br />Single 0.31 0.45 0.31. 0.45 <br />Family <br />Commercial 5.01 1.33 5.0i 1.33 <br />Industrial <br />TOT. LOADING 6.66 Lbs/Yr 10.43 Lbs/Yr <br />Grassy 3.85 12.0 2.73 12.0 <br />Marsh <br />TOT. CAPACITY 46.2 Lbs,Yr 32.8 Lbs/Yr <br />The total allowable fillable acres is determined by balancing the <br />lost assimilative capacity per acre of fill plus the additional <br />loading due to the use of the area with the surplus assimilative <br />capacity: <br />Fillable Acres = _(4 R7 - 10- 3) lbs/Yr = 2.3 Acres <br />(12 + 3.46) lbs/Ac/Yr <br />Minimum Wetland Preservation Area (3.65 - 2.3) Acres = 1.55 I. <br />Therefore the proposed development does not affect the nutrient <br />assimilative capacity of the wetland involved. <br />Si,IncereI <br />A cc: S. Woods, RCWD <br />ulie Myhre, engineer Jim Cepress <br />9201 East Bloomington Freeway, Bloomington, Minnesota 55420, Telephone (612) 888-0289 <br />