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

Hydrograph 2-yr Summary File: Eagle Rock Proposed (Future).hys Hydrology Studio v 3.0.0.39 10-22-2025 Hyd. Hydrograph Hydrograph Peak Time to Hydrograph Inflow Maximum Maximum Flow Peak Volume Hyd(s) Elevation Storage No. Type Name (cfs) (min) (cuft) (ft) (cuft) 1 NRCS Runoff PR-1A-D Grass D 0.150 69 202 ---- 2 NRCS Runoff PR-1A-D Imp 0.924 65 1,127 ---- 3 Junction PR-1A-D 1.013 65 1,329 1, 2 5 NRCS Runoff PR-1A-U Open Space C 0.044 76 89.7 ---- 6 NRCS Runoff PR-1A-U Woods C 0.004 81 9.73 ---- 7 NRCS Runoff PR-1A-U Imp 1.444 65 1,760 ---- 8 Junction PR-1A-U 1.449 65 1,860 5, 6, 7 10 Junction PR-1A Total 2.461 65 3,188 3, 8 11 Pond Route PR-1A Routing 0.000 61 0.001 10 534.52 2,487 13 NRCS Runoff PR-1B-D 0.180 68 227 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.036 77 76.3 ---- 16 NRCS Runoff PR-1B-U Woods C 0.027 83 72.9 ---- 17 NRCS Runoff PR-1B-U Impervious 3.349 66 4,321 ---- 18 Junction PR-1B-U 3.355 66 4,470 15, 16, 17 21 Junction PR-1B (Swale) 3.512 66 4,696 13, 18 24 NRCS Runoff PR-1C-D Open Space D 0.192 65 188 ---- 25 NRCS Runoff PR-1C-D Impervious 0.318 65 387 ---- 26 Junction PR-1C-D

D Open Space D 0.192 65 188 ---- 25 NRCS Runoff PR-1C-D Impervious 0.318 65 387 ---- 26 Junction PR-1C-D 0.510 65 576 24, 25 28 NRCS Runoff PR-1C-U Open Space C 0.103 75 195 ---- 29 NRCS Runoff PR-1C-U Impervious 3.417 65 4,206 ---- 30 Junction PR-1C-U 3.432 65 4,401 28, 29 32 Junction POA-1 7.380 65 9,673 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 0.412 68 518 ---- 36 NRCS Runoff PR-2A-D Impervious 1.213 65 1,479 ----