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 10-21-2025 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 0.756 12.13 2,462 ---- 2 NRCS Runoff PR-1A-D Imp 1.279 12.10 4,187 ---- 3 Junction PR-1A-D 1.993 12.10 6,649 1, 2 5 NRCS Runoff PR-1A-U Open Space C 0.540 12.17 2,018 ---- 6 NRCS Runoff PR-1A-U Woods C 0.107 12.17 409 ---- 7 NRCS Runoff PR-1A-U Imp 1.998 12.10 6,542 ---- 8 Junction PR-1A-U 2.527 12.10 8,970 5, 6, 7 10 Junction PR-1A Total 4.520 12.10 15,619 3, 8 11 Pond Route PR-1A Routing 1.262 12.33 12,719 10 535.39 6,769 13 NRCS Runoff PR-1B-D 0.893 12.12 2,762 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.441 12.18 1,715 ---- 16 NRCS Runoff PR-1B-U Woods C 0.772 12.18 3,065 ---- 17 NRCS Runoff PR-1B-U Impervious 4.234 12.12 16,058 ---- 18 Junction PR-1B-U 5.324 12.13 20,838 15, 16, 17 21 Junction PR-1B (Swale) 6.200 12.13 23,599 13, 18 24 NRCS Runoff PR-1C-D Open Space D 0.842 12.10 2,296 ---- 25 NRCS Runoff PR-1C-D Impervious 0.440 12.10 1,439 ---- 26 Junction PR-1C-D

D Open Space D 0.842 12.10 2,296 ---- 25 NRCS Runoff PR-1C-D Impervious 0.440 12.10 1,439 ---- 26 Junction PR-1C-D 1.282 12.10 3,735 24, 25 28 NRCS Runoff PR-1C-U Open Space C 1.251 12.15 4,386 ---- 29 NRCS Runoff PR-1C-U Impervious 4.676 12.10 15,632 ---- 30 Junction PR-1C-U 5.772 12.10 20,018 28, 29 32 Junction POA-1 14.07 12.12 60,072 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 2.042 12.12 6,313 ---- 36 NRCS Runoff PR-2A-D Impervious 1.679 12.10 5,496 ----