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

Hydrograph 2-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 1.274 12.18 4,896 ---- 2 NRCS Runoff EX-1-D Woods D 1.356 12.18 5,225 ---- 3 NRCS Runoff EX-1-D Impervious 0.359 12.12 1,295 ---- 4 Junction EX-1-D 2.885 12.17 11,416 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 1.443 12.17 5,708 4 7 Diversion2 <name> 1.443 12.17 5,708 4 8 Diversion1 EX-1-D 10 YR ALLOW 2.164 12.17 8,562 4 9 Diversion2 <name> 0.721 12.17 2,854 4 10 Diversion1 EX-1-D 100 YR ALLOW 2.308 12.17 9,133 4 11 Diversion2 <name> 0.577 12.17 2,283 4 13 NRCS Runoff EX-1-U Open Space C 2.070 12.18 8,044 ---- 14 NRCS Runoff EX-1-U Woods C 0.871 12.18 3,460 ---- 15 NRCS Runoff EX-1-U Impervious 11.73 12.12 42,316 ---- 16 Junction EX-1-U 14.21 12.12 53,820 13, 14, 15 18 Junction TOTAL POA-1 16.83 12.12 65,237 4, 16 19 Junction POA-1 2 yr Allow 15.52 12.12 59,528 6, 16 20 Junction POA-1 10 yr Allow 16.18 12.12 62,383 8, 16 21 Junction POA-1 100yr Allow 16.31 12.12 62,953 10, 16 25 NRCS

Junction POA-1 10 yr Allow 16.18 12.12 62,383 8, 16 21 Junction POA-1 100yr Allow 16.31 12.12 62,953 10, 16 25 NRCS Runoff EX-2-D Open Space D 0.774 12.20 3,137 ---- 26 NRCS Runoff EX-2-D Woods D 1.707 12.20 6,941 ---- 27 NRCS Runoff EX-2-D Gravel D 0.261 12.10 786 ---- 28 NRCS Runoff EX-2-D Impervious 3.799 12.10 12,701 ---- 30 Junction EX-2-D 5.948 12.12 23,566 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 2.974 12.12 11,783 30 32 Diversion2 <name> 2.974 12.12 11,783 30 33 Diversion1 EX-2-D 10 YR ALLOW 4.461 12.12 17,674 30 34 Diversion2 <name> 1.487 12.12 5,891 30 35 Diversion1 EX-2-D 100 YR ALLOW 4.758 12.12 18,852 30 36 Diversion2 <name> 1.190 12.12 4,713 30