Eugene Stormwater Facility CalculatorProject Name: BraewoodBasin: Swale 1 (Basins L1, L2, L3, S1, and S2)Instructions:Date: 8/28/20251. Choose Facility Type2. Choose shape3. Complete information in highlighted cellsFacilitySwaleSwale TypeVegetatedShapeRectangularBelow-GradeSee Swale Worksheet1,168sfSee Swale Worksheet1,1685ft124to 10.406in18inTested infiltration rate1.00in/hrInfiltration Safety Factor2.00Surface Storage Capacity6cf0Infiltration Area @ 75%66sfDesign Infiltration Rate0.50in/hrGM Infiltration Rate2.5in/hrInfiltration Capacity0.001cfsInfiltration Capacity (avg)0.004cfsResultsSURFACE CAPACITYRecurrance IntervalPeak Flow (cfs)Volume (cf)Meets Infiltration?WQ1.230917,453Filtration Only2-Yr3.161943,6075-Yr3.825352,31410-Yr5.056268,3546925-Yr6.117282,11350-Yr7.349198,032100-Yr8.0787107,448WATER QUALITY EVENTPASSROCK CAPACITY N/ARock CapacityN/AN/AN/AN/AOpen, No Rock10-Yr Infiltration Volume (cf):N/A100%N/AN/A 1201 Oak Street, Suite 100 Eugene, OR 97401 541.684.4902 kpff.com