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

Hydrograph 100-yr Summary File: Eagle Rock Proposed (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 PR-1A-D Grass D 3.062 12.13 10,581 ---- 2 NRCS Runoff PR-1A-D Imp 3.659 12.10 12,370 ---- 3 Junction PR-1A-D 6.611 12.10 22,951 1, 2 5 NRCS Runoff PR-1A-U Open Space C 2.644 12.17 10,047 ---- 6 NRCS Runoff PR-1A-U Woods C 0.604 12.17 2,270 ---- 7 NRCS Runoff PR-1A-U Imp 5.717 12.10 19,327 ---- 8 Junction PR-1A-U 8.523 12.10 31,645 5, 6, 7 10 Junction PR-1A Total 15.13 12.10 54,595 3, 8 11 Pond Route PR-1A Routing 10.05 12.15 51,696 10 536.73 13,696 13 NRCS Runoff PR-1B-D 3.616 12.12 11,870 ---- 15 NRCS Runoff PR-1B-U Open Space C 2.163 12.18 8,539 ---- 16 NRCS Runoff PR-1B-U Woods C 4.359 12.18 17,013 ---- 17 NRCS Runoff PR-1B-U Impervious 12.13 12.12 47,437 ---- 18 Junction PR-1B-U 18.24 12.13 72,989 15, 16, 17 21 Junction PR-1B (Swale) 21.76 12.13 84,859 13, 18 24 NRCS Runoff PR-1C-D Open Space D 3.337 12.10 9,866 ---- 25 NRCS Runoff PR-1C-D Impervious 1.258 12.10 4,252 ---- 26 Junction PR-1C-D

-D Open Space D 3.337 12.10 9,866 ---- 25 NRCS Runoff PR-1C-D Impervious 1.258 12.10 4,252 ---- 26 Junction PR-1C-D 4.595 12.10 14,118 24, 25 28 NRCS Runoff PR-1C-U Open Space C 6.092 12.15 21,836 ---- 29 NRCS Runoff PR-1C-U Impervious 13.38 12.10 46,180 ---- 30 Junction PR-1C-U 18.95 12.10 68,016 28, 29 32 Junction POA-1 53.61 12.12 218,689 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 8.266 12.12 27,131 ---- 36 NRCS Runoff PR-2A-D Impervious 4.802 12.10 16,235 ----