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

Hydrograph 25-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 1.559 12.13 5,182 ---- 2 NRCS Runoff PR-1A-D Imp 2.116 12.10 7,058 ---- 3 Junction PR-1A-D 3.607 12.10 12,240 1, 2 5 NRCS Runoff PR-1A-U Open Space C 1.250 12.17 4,632 ---- 6 NRCS Runoff PR-1A-U Woods C 0.271 12.17 1,001 ---- 7 NRCS Runoff PR-1A-U Imp 3.306 12.10 11,028 ---- 8 Junction PR-1A-U 4.592 12.10 16,661 5, 6, 7 10 Junction PR-1A Total 8.199 12.10 28,901 3, 8 11 Pond Route PR-1A Routing 3.069 12.27 26,002 10 536.03 10,002 13 NRCS Runoff PR-1B-D 1.842 12.12 5,813 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.986 12.20 3,999 ---- 16 NRCS Runoff PR-1B-U Woods C 1.881 12.20 7,623 ---- 17 NRCS Runoff PR-1B-U Impervious 7.010 12.12 27,067 ---- 18 Junction PR-1B-U 9.525 12.13 38,689 15, 16, 17 21 Junction PR-1B (Swale) 11.32 12.13 44,502 13, 18 24 NRCS Runoff PR-1C-D Open Space D 1.714 12.10 4,832 ---- 25 NRCS Runoff PR-1C-D Impervious 0.727 12.10 2,426 ---- 26 Junction PR-1C-D

-D Open Space D 1.714 12.10 4,832 ---- 25 NRCS Runoff PR-1C-D Impervious 0.727 12.10 2,426 ---- 26 Junction PR-1C-D 2.441 12.10 7,258 24, 25 28 NRCS Runoff PR-1C-U Open Space C 2.887 12.15 10,067 ---- 29 NRCS Runoff PR-1C-U Impervious 7.739 12.10 26,350 ---- 30 Junction PR-1C-U 10.33 12.10 36,417 28, 29 32 Junction POA-1 26.22 12.12 114,179 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 4.209 12.12 13,287 ---- 36 NRCS Runoff PR-2A-D Impervious 2.777 12.10 9,264 ----