12 2026 02 12 Crestmont CC Stormwater Management Report

Hydrograph 10-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 1.871 12.20 7,614 ---- 2 NRCS Runoff EX-1-D Woods D 2.057 12.20 8,335 ---- 3 NRCS Runoff EX-1-D Impervious 0.475 12.12 1,733 ---- 4 Junction EX-1-D 4.218 12.18 17,682 1, 2, 3 6 Diversion1 EX-1-D 2 YR ALLOW 2.109 12.18 8,841 4 7 Diversion2 <name> 2.109 12.18 8,841 4 8 Diversion1 EX-1-D 10 YR ALLOW 3.163 12.18 13,261 4 9 Diversion2 <name> 1.054 12.18 4,420 4 10 Diversion1 EX-1-D 100 YR ALLOW 3.374 12.18 14,146 4 11 Diversion2 <name> 0.844 12.18 3,536 4 13 NRCS Runoff EX-1-U Open Space C 3.376 12.18 12,980 ---- 14 NRCS Runoff EX-1-U Woods C 1.502 12.18 5,809 ---- 15 NRCS Runoff EX-1-U Impervious 15.51 12.12 56,598 ---- 16 Junction EX-1-U 19.71 12.12 75,387 13, 14, 15 18 Junction TOTAL POA-1 23.47 12.13 93,069 4, 16 19 Junction POA-1 2 yr Allow 21.58 12.12 84,228 6, 16 20 Junction POA-1 10 yr Allow 22.52 12.12 88,648 8, 16 21 Junction POA-1 100yr Allow 22.71 12.12 89,532 10, 16 25 NRCS

Junction POA-1 10 yr Allow 22.52 12.12 88,648 8, 16 21 Junction POA-1 100yr Allow 22.71 12.12 89,532 10, 16 25 NRCS Runoff EX-2-D Open Space D 1.180 12.20 4,803 ---- 26 NRCS Runoff EX-2-D Woods D 2.690 12.20 10,900 ---- 27 NRCS Runoff EX-2-D Gravel D 0.360 12.10 1,106 ---- 28 NRCS Runoff EX-2-D Impervious 5.026 12.10 16,988 ---- 30 Junction EX-2-D 8.415 12.12 33,796 25, 26, 27, 28 31 Diversion1 EX-2-D 2 YR ALLOW 4.208 12.12 16,898 30 32 Diversion2 <name> 4.208 12.12 16,898 30 33 Diversion1 EX-2-D 10 YR ALLOW 6.312 12.12 25,347 30 34 Diversion2 <name> 2.104 12.12 8,449 30 35 Diversion1 EX-2-D 100 YR ALLOW 6.732 12.12 27,037 30 36 Diversion2 <name> 1.683 12.12 6,759 30