2026 02 12 Crestmont CC and Eagle Rock Ave Stormwater Management Report

Hydrograph 100-yr Summary File: Eagle Rock Existing (Current).hys Hydrology Studio v 3.0.0.39 10-21-2025 Hyd. Hydrograph Hydrograph Peak Time to Hydrograph Inflow Maximum Maximum Flow Peak Volume Hyd(s) Elevation Storage No. Type Name (cfs) (hrs) (cuft) (ft) (cuft) 1 NRCS Runoff EX-1-D Open Space D 3.834 12.20 16,035 ---- 2 NRCS Runoff EX-1-D Woods D 4.396 12.20 18,185 ---- 3 NRCS Runoff EX-1-D Impervious 0.818 12.12 3,032 ---- 4 Junction EX-1-D 8.751 12.18 37,253 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 4.376 12.18 18,626 4 7 Diversion2 <name> 4.376 12.18 18,626 4 8 Diversion1 EX-1-D 10 YR ALLOW 6.563 12.18 27,940 4 9 Diversion2 <name> 2.188 12.18 9,313 4 10 Diversion1 EX-1-D 100 YR ALLOW 7.001 12.18 29,802 4 11 Diversion2 <name> 1.750 12.18 7,451 4 13 NRCS Runoff EX-1-U Open Space C 7.542 12.18 29,392 ---- 14 NRCS Runoff EX-1-U Woods C 3.591 12.18 13,875 ---- 15 NRCS Runoff EX-1-U Impervious 26.72 12.12 99,046 ---- 16 Junction EX-1-U 36.55 12.12 142,313 13, 14, 15 18 Junction TOTAL POA-1 44.56 12.13 179,566 4, 16 19 Junction POA-1 2 yr Allow 40.46 12.12 160,939 6, 16 20 Junction POA-1 10 yr Allow 42.50 12.13 170,253 8, 16 21 Junction POA-1 100yr Allow 42.92 12.13 172,115 10, 16 25 NRCS

Junction POA-1 10 yr Allow 42.50 12.13 170,253 8, 16 21 Junction POA-1 100yr Allow 42.92 12.13 172,115 10, 16 25 NRCS Runoff EX-2-D Open Space D 2.418 12.20 10,115 ---- 26 NRCS Runoff EX-2-D Woods D 5.749 12.20 23,781 ---- 27 NRCS Runoff EX-2-D Gravel D 0.647 12.10 2,071 ---- 28 NRCS Runoff EX-2-D Impervious 8.657 12.10 29,728 ---- 30 Junction EX-2-D 15.92 12.12 65,695 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 7.962 12.12 32,847 30 32 Diversion2 <name> 7.962 12.12 32,847 30 33 Diversion1 EX-2-D 10 YR ALLOW 11.94 12.12 49,271 30 34 Diversion2 <name> 3.981 12.12 16,424 30 35 Diversion1 EX-2-D 100 YR ALLOW 12.74 12.12 52,556 30 36 Diversion2 <name> 3.185 12.12 13,139 30