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

Hydrograph 10-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 1.147 12.13 3,769 ---- 2 NRCS Runoff PR-1A-D Imp 1.691 12.10 5,600 ---- 3 Junction PR-1A-D 2.783 12.10 9,369 1, 2 5 NRCS Runoff PR-1A-U Open Space C 0.881 12.17 3,257 ---- 6 NRCS Runoff PR-1A-U Woods C 0.185 12.17 686 ---- 7 NRCS Runoff PR-1A-U Imp 2.643 12.10 8,750 ---- 8 Junction PR-1A-U 3.532 12.10 12,694 5, 6, 7 10 Junction PR-1A Total 6.316 12.10 22,063 3, 8 11 Pond Route PR-1A Routing 2.246 12.28 19,163 10 535.71 8,419 13 NRCS Runoff PR-1B-D 1.356 12.12 4,228 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.694 12.20 2,812 ---- 16 NRCS Runoff PR-1B-U Woods C 1.281 12.20 5,227 ---- 17 NRCS Runoff PR-1B-U Impervious 5.603 12.12 21,477 ---- 18 Junction PR-1B-U 7.312 12.13 29,515 15, 16, 17 21 Junction PR-1B (Swale) 8.638 12.13 33,743 13, 18 24 NRCS Runoff PR-1C-D Open Space D 1.268 12.10 3,514 ---- 25 NRCS Runoff PR-1C-D Impervious 0.581 12.10 1,925 ---- 26 Junction PR-1C-D

D Open Space D 1.268 12.10 3,514 ---- 25 NRCS Runoff PR-1C-D Impervious 0.581 12.10 1,925 ---- 26 Junction PR-1C-D 1.849 12.10 5,439 24, 25 28 NRCS Runoff PR-1C-U Open Space C 2.035 12.15 7,078 ---- 29 NRCS Runoff PR-1C-U Impervious 6.186 12.10 20,908 ---- 30 Junction PR-1C-U 7.998 12.10 27,986 28, 29 32 Junction POA-1 19.76 12.12 86,331 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 3.098 12.12 9,664 ---- 36 NRCS Runoff PR-2A-D Impervious 2.220 12.10 7,350 ----