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

Hydrograph 100-yr Summary File: Eagle Rock Existing (Future).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 5.206 12.17 21,042 ---- 2 NRCS Runoff EX-1-D Woods D 6.043 12.18 24,118 ---- 3 NRCS Runoff EX-1-D Impervious 1.028 12.12 3,827 ---- 4 Junction EX-1-D 12.04 12.17 48,987 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 6.021 12.17 24,494 4 7 Diversion2 <name> 6.021 12.17 24,494 4 8 Diversion1 EX-1-D 10 YR ALLOW 9.031 12.17 36,740 4 9 Diversion2 <name> 3.010 12.17 12,247 4 10 Diversion1 EX-1-D 100 YR ALLOW 9.633 12.17 39,190 4 11 Diversion2 <name> 2.408 12.17 9,797 4 13 NRCS Runoff EX-1-U Open Space C 10.14 12.18 40,046 ---- 14 NRCS Runoff EX-1-U Woods C 4.921 12.18 19,208 ---- 15 NRCS Runoff EX-1-U Impervious 33.57 12.12 125,010 ---- 16 Junction EX-1-U 46.96 12.12 184,264 13, 14, 15 18 Junction TOTAL POA-1 58.39 12.13 233,251 4, 16 19 Junction POA-1 2 yr Allow 52.56 12.13 208,758 6, 16 20 Junction POA-1 10 yr Allow 55.47 12.13 221,004 8, 16 21 Junction POA-1 100yr Allow 56.05 12.13 223,454 10, 16 25 NRCS

Junction POA-1 10 yr Allow 55.47 12.13 221,004 8, 16 21 Junction POA-1 100yr Allow 56.05 12.13 223,454 10, 16 25 NRCS Runoff EX-2-D Open Space D 3.174 12.20 13,483 ---- 26 NRCS Runoff EX-2-D Woods D 7.636 12.20 32,040 ---- 27 NRCS Runoff EX-2-D Gravel D 0.820 12.10 2,666 ---- 28 NRCS Runoff EX-2-D Impervious 10.88 12.10 37,521 ---- 30 Junction EX-2-D 20.54 12.12 85,710 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 10.27 12.12 42,855 30 32 Diversion2 <name> 10.27 12.12 42,855 30 33 Diversion1 EX-2-D 10 YR ALLOW 15.40 12.12 64,283 30 34 Diversion2 <name> 5.134 12.12 21,428 30 35 Diversion1 EX-2-D 100 YR ALLOW 16.43 12.12 68,568 30 36 Diversion2 <name> 4.107 12.12 17,142 30