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

Hydrograph 2-yr Summary File: Eagle Rock Proposed (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 PR-1A-D Grass D 0.575 12.13 1,874 ---- 2 NRCS Runoff PR-1A-D Imp 1.082 12.10 3,514 ---- 3 Junction PR-1A-D 1.622 12.10 5,388 1, 2 5 NRCS Runoff PR-1A-U Open Space C 0.389 12.17 1,478 ---- 6 NRCS Runoff PR-1A-U Woods C 0.074 12.18 291 ---- 7 NRCS Runoff PR-1A-U Imp 1.690 12.10 5,490 ---- 8 Junction PR-1A-U 2.062 12.10 7,259 5, 6, 7 10 Junction PR-1A Total 3.684 12.10 12,647 3, 8 11 Pond Route PR-1A Routing 1.034 12.33 9,748 10 535.18 5,747 13 NRCS Runoff PR-1B-D 0.680 12.12 2,102 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.305 12.20 1,276 ---- 16 NRCS Runoff PR-1B-U Woods C 0.510 12.22 2,213 ---- 17 NRCS Runoff PR-1B-U Impervious 3.580 12.12 13,475 ---- 18 Junction PR-1B-U 4.256 12.13 16,965 15, 16, 17 21 Junction PR-1B (Swale) 4.925 12.13 19,068 13, 18 24 NRCS Runoff PR-1C-D Open Space D 0.645 12.10 1,748 ---- 25 NRCS Runoff PR-1C-D Impervious 0.372 12.10 1,208 ---- 26 Junction PR-1C-D

D Open Space D 0.645 12.10 1,748 ---- 25 NRCS Runoff PR-1C-D Impervious 0.372 12.10 1,208 ---- 26 Junction PR-1C-D 1.017 12.10 2,955 24, 25 28 NRCS Runoff PR-1C-U Open Space C 0.902 12.15 3,213 ---- 29 NRCS Runoff PR-1C-U Impervious 3.954 12.10 13,118 ---- 30 Junction PR-1C-U 4.735 12.10 16,331 28, 29 32 Junction POA-1 11.32 12.12 48,102 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 1.555 12.12 4,806 ---- 36 NRCS Runoff PR-2A-D Impervious 1.420 12.10 4,612 ----