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

Hydrograph 25-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 1.994 12.13 6,712 ---- 2 NRCS Runoff PR-1A-D Imp 2.562 12.10 8,592 ---- 3 Junction PR-1A-D 4.475 12.10 15,305 1, 2 5 NRCS Runoff PR-1A-U Open Space C 1.649 12.17 6,148 ---- 6 NRCS Runoff PR-1A-U Woods C 0.365 12.17 1,353 ---- 7 NRCS Runoff PR-1A-U Imp 4.003 12.10 13,426 ---- 8 Junction PR-1A-U 5.721 12.10 20,926 5, 6, 7 10 Junction PR-1A Total 10.20 12.10 36,231 3, 8 11 Pond Route PR-1A Routing 4.639 12.23 33,331 10 536.30 11,447 13 NRCS Runoff PR-1B-D 2.356 12.12 7,530 ---- 15 NRCS Runoff PR-1B-U Open Space C 1.349 12.18 5,225 ---- 16 NRCS Runoff PR-1B-U Woods C 2.633 12.18 10,138 ---- 17 NRCS Runoff PR-1B-U Impervious 8.489 12.12 32,952 ---- 18 Junction PR-1B-U 12.19 12.13 48,315 15, 16, 17 21 Junction PR-1B (Swale) 14.48 12.13 55,845 13, 18 24 NRCS Runoff PR-1C-D Open Space D 2.185 12.10 6,258 ---- 25 NRCS Runoff PR-1C-D Impervious 0.881 12.10 2,954 ---- 26 Junction PR-1C-D

-D Open Space D 2.185 12.10 6,258 ---- 25 NRCS Runoff PR-1C-D Impervious 0.881 12.10 2,954 ---- 26 Junction PR-1C-D 3.065 12.10 9,212 24, 25 28 NRCS Runoff PR-1C-U Open Space C 3.804 12.15 13,361 ---- 29 NRCS Runoff PR-1C-U Impervious 9.371 12.10 32,078 ---- 30 Junction PR-1C-U 12.81 12.10 45,439 28, 29 32 Junction POA-1 33.09 12.12 143,827 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 5.384 12.12 17,211 ---- 36 NRCS Runoff PR-2A-D Impervious 3.362 12.10 11,277 ----