2026 05 Storm Water Management Report rcd 5 6 2026

TABLE OF CONTENTS Page No. 1. Site Description & Project Overview ..............................................1 2. Design Methodology .....................................................................1 3. Existing Drainage Conditions ........................................................2 4. Proposed Drainage Conditions .....................................................4 5. Stormwater Management System Design .....................................6 6. Green Infrastructure Compliance ..................................................7 7. Water Quantity Control Compliance ..............................................7 8. Water Quality Compliance ............................................................8 9. Groundwater Recharge Compliance .............................................9 10. Storm Sewer Design .....................................................................9 11. Soil Erosion and Sediment Control Compliance ............................9 12. Conclusion ....................................................................................9 APPENDIX • NRCS Web Soil Survey • Existing Conditions Hydrology – Current & Projected 2, 10, & 100 yr. • Proposed Conditions Hydrology – Current & Projected 2, 10, & 100 yr. • Water Quality Calculations • Stormwater Collection System Calculations (Pipe Sizing) • Basin Drain Time Calculations • Riprap Stability Calculations • Results of Test Pit Excavation and Infiltration Testing – Prepared by ECS • Drainage Area Maps