12 2026 02 12 Crestmont CC Stormwater Management Report

Hydrograph 2-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 0.932 12.20 3,786 ---- 2 NRCS Runoff EX-1-D Woods D 0.967 12.20 3,966 ---- 3 NRCS Runoff EX-1-D Impervious 0.304 12.12 1,087 ---- 4 Junction EX-1-D 2.078 12.18 8,840 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 1.039 12.18 4,420 4 7 Diversion2 <name> 1.039 12.18 4,420 4 8 Diversion1 EX-1-D 10 YR ALLOW 1.558 12.18 6,630 4 9 Diversion2 <name> 0.519 12.18 2,210 4 10 Diversion1 EX-1-D 100 YR ALLOW 1.662 12.18 7,072 4 11 Diversion2 <name> 0.416 12.18 1,768 4 13 NRCS Runoff EX-1-U Open Space C 1.491 12.18 5,892 ---- 14 NRCS Runoff EX-1-U Woods C 0.600 12.20 2,460 ---- 15 NRCS Runoff EX-1-U Impervious 9.916 12.12 35,511 ---- 16 Junction EX-1-U 11.65 12.12 43,863 13, 14, 15 18 Junction TOTAL POA-1 13.48 12.12 52,703 4, 16 19 Junction POA-1 2 yr Allow 12.57 12.12 48,283 6, 16 20 Junction POA-1 10 yr Allow 13.02 12.12 50,493 8, 16 21 Junction POA-1 100yr Allow 13.12 12.12 50,935 10, 16 25 NRCS

Junction POA-1 10 yr Allow 13.02 12.12 50,493 8, 16 21 Junction POA-1 100yr Allow 13.12 12.12 50,935 10, 16 25 NRCS Runoff EX-2-D Open Space D 0.588 12.20 2,388 ---- 26 NRCS Runoff EX-2-D Woods D 1.264 12.20 5,187 ---- 27 NRCS Runoff EX-2-D Gravel D 0.214 12.10 636 ---- 28 NRCS Runoff EX-2-D Impervious 3.213 12.10 10,658 ---- 30 Junction EX-2-D 4.802 12.12 18,870 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 2.401 12.12 9,435 30 32 Diversion2 <name> 2.401 12.12 9,435 30 33 Diversion1 EX-2-D 10 YR ALLOW 3.601 12.12 14,152 30 34 Diversion2 <name> 1.200 12.12 4,717 30 35 Diversion1 EX-2-D 100 YR ALLOW 3.841 12.12 15,096 30 36 Diversion2 <name> 0.960 12.12 3,774 30