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

Hydrograph 100-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 2.337 12.13 7,937 ---- 2 NRCS Runoff PR-1A-D Imp 2.913 12.10 9,800 ---- 3 Junction PR-1A-D 5.159 12.10 17,738 1, 2 5 NRCS Runoff PR-1A-U Open Space C 1.966 12.17 7,374 ---- 6 NRCS Runoff PR-1A-U Woods C 0.441 12.17 1,640 ---- 7 NRCS Runoff PR-1A-U Imp 4.551 12.10 15,313 ---- 8 Junction PR-1A-U 6.615 12.10 24,327 5, 6, 7 10 Junction PR-1A Total 11.77 12.10 42,065 3, 8 11 Pond Route PR-1A Routing 6.121 12.22 39,166 10 536.47 12,336 13 NRCS Runoff PR-1B-D 2.760 12.12 8,904 ---- 15 NRCS Runoff PR-1B-U Open Space C 1.552 12.20 6,367 ---- 16 NRCS Runoff PR-1B-U Woods C 3.068 12.20 12,484 ---- 17 NRCS Runoff PR-1B-U Impervious 9.653 12.12 37,585 ---- 18 Junction PR-1B-U 13.76 12.13 56,436 15, 16, 17 21 Junction PR-1B (Swale) 16.45 12.13 65,340 13, 18 24 NRCS Runoff PR-1C-D Open Space D 2.555 12.10 7,401 ---- 25 NRCS Runoff PR-1C-D Impervious 1.001 12.10 3,369 ---- 26 Junction PR-1C-D

-D Open Space D 2.555 12.10 7,401 ---- 25 NRCS Runoff PR-1C-D Impervious 1.001 12.10 3,369 ---- 26 Junction PR-1C-D 3.556 12.10 10,770 24, 25 28 NRCS Runoff PR-1C-U Open Space C 4.534 12.15 16,027 ---- 29 NRCS Runoff PR-1C-U Impervious 10.66 12.10 36,588 ---- 30 Junction PR-1C-U 14.77 12.10 52,616 28, 29 32 Junction POA-1 38.87 12.12 167,892 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 6.309 12.12 20,352 ---- 36 NRCS Runoff PR-2A-D Impervious 3.823 12.10 12,863 ----