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

Hydrograph 10-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 2.457 12.18 9,562 ---- 2 NRCS Runoff EX-1-D Woods D 2.745 12.18 10,603 ---- 3 NRCS Runoff EX-1-D Impervious 0.563 12.12 2,066 ---- 4 Junction EX-1-D 5.617 12.17 22,230 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 2.809 12.17 11,115 4 7 Diversion2 <name> 2.809 12.17 11,115 4 8 Diversion1 EX-1-D 10 YR ALLOW 4.213 12.17 16,673 4 9 Diversion2 <name> 1.404 12.17 5,558 4 10 Diversion1 EX-1-D 100 YR ALLOW 4.494 12.17 17,784 4 11 Diversion2 <name> 1.123 12.17 4,446 4 13 NRCS Runoff EX-1-U Open Space C 4.419 12.18 17,001 ---- 14 NRCS Runoff EX-1-U Woods C 2.017 12.18 7,758 ---- 15 NRCS Runoff EX-1-U Impervious 18.39 12.12 67,481 ---- 16 Junction EX-1-U 23.98 12.12 92,240 13, 14, 15 18 Junction TOTAL POA-1 29.21 12.13 114,471 4, 16 19 Junction POA-1 2 yr Allow 26.56 12.12 103,356 6, 16 20 Junction POA-1 10 yr Allow 27.85 12.13 108,913 8, 16 21 Junction POA-1 100yr Allow 28.13 12.13 110,025 10, 16 25 NRCS

Junction POA-1 10 yr Allow 27.85 12.13 108,913 8, 16 21 Junction POA-1 100yr Allow 28.13 12.13 110,025 10, 16 25 NRCS Runoff EX-2-D Open Space D 1.496 12.20 6,127 ---- 26 NRCS Runoff EX-2-D Woods D 3.463 12.20 14,085 ---- 27 NRCS Runoff EX-2-D Gravel D 0.434 12.10 1,352 ---- 28 NRCS Runoff EX-2-D Impervious 5.958 12.10 20,254 ---- 30 Junction EX-2-D 10.33 12.12 41,818 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 5.163 12.12 20,909 30 32 Diversion2 <name> 5.163 12.12 20,909 30 33 Diversion1 EX-2-D 10 YR ALLOW 7.745 12.12 31,364 30 34 Diversion2 <name> 2.582 12.12 10,454 30 35 Diversion1 EX-2-D 100 YR ALLOW 8.262 12.12 33,454 30 36 Diversion2 <name> 2.065 12.12 8,364 30