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

Hydrograph 10-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 1.451 12.13 4,808 ---- 2 NRCS Runoff PR-1A-D Imp 2.005 12.10 6,677 ---- 3 Junction PR-1A-D 3.391 12.10 11,485 1, 2 5 NRCS Runoff PR-1A-U Open Space C 1.152 12.17 4,266 ---- 6 NRCS Runoff PR-1A-U Woods C 0.248 12.17 917 ---- 7 NRCS Runoff PR-1A-U Imp 3.133 12.10 10,433 ---- 8 Junction PR-1A-U 4.314 12.10 15,615 5, 6, 7 10 Junction PR-1A Total 7.705 12.10 27,101 3, 8 11 Pond Route PR-1A Routing 2.884 12.27 24,202 10 535.94 9,573 13 NRCS Runoff PR-1B-D 1.714 12.12 5,394 ---- 15 NRCS Runoff PR-1B-U Open Space C 0.942 12.18 3,625 ---- 16 NRCS Runoff PR-1B-U Woods C 1.787 12.18 6,871 ---- 17 NRCS Runoff PR-1B-U Impervious 6.642 12.12 25,607 ---- 18 Junction PR-1B-U 9.155 12.13 36,104 15, 16, 17 21 Junction PR-1B (Swale) 10.83 12.13 41,497 13, 18 24 NRCS Runoff PR-1C-D Open Space D 1.597 12.10 4,483 ---- 25 NRCS Runoff PR-1C-D Impervious 0.689 12.10 2,295 ---- 26 Junction PR-1C-D

D Open Space D 1.597 12.10 4,483 ---- 25 NRCS Runoff PR-1C-D Impervious 0.689 12.10 2,295 ---- 26 Junction PR-1C-D 2.286 12.10 6,778 24, 25 28 NRCS Runoff PR-1C-U Open Space C 2.662 12.15 9,270 ---- 29 NRCS Runoff PR-1C-U Impervious 7.333 12.10 24,928 ---- 30 Junction PR-1C-U 9.721 12.10 34,199 28, 29 32 Junction POA-1 24.77 12.12 106,676 11, 21, 26, 30 35 NRCS Runoff PR-2A-D Open Space D 3.918 12.12 12,329 ---- 36 NRCS Runoff PR-2A-D Impervious 2.631 12.10 8,764 ----