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HomeMy WebLinkAboutTR 35337 HYDROLOGY REPORT-026 Spyglass Ranch Tract 35337 Hydrology Study Table 13: Basin #3 - Depth vs. Outflow 1.96 1586.66 0.121 0.00 0.00 0.12 61.45 1.63 1586.33 0.111 0.00 0.00 0.11 58.26 1.30 1586.00 0.099 0.00 0.00 0.10 54.88 0.96 1585.66 0.085 0.00 0.00 0.08 51.17 0.63 1585.33 0.069 0.00 0.00 0.07 47.28 0.30 1585.00 0.047 0.00 0.00 0.05 43.05 Notes: 1. (3) 1 in. dia. orifices in exterior baffle wall, invert elev=1584.66. 2. (3) 12 in. dia. orifices in exterior baffle wall, invert elev=1587.15. 3. 6 ft. wide baffle wall structure, top wall elev=1590.00. 4. Main outlet Q used to confirm WSE inside baffle chamber. Q not used in determining the route rating curve. Tables 14 summarizes the outlet structure design for Basin #3. Table 14: Basin #3 Outlet Structure Design Summary Outlet Structure Orifices (Stages 1 and 2) Invert Number Invert elev. of Dia. (in) Area Elev. above Remark orifices (sf) (MSL) bottom (ft) Stage 1 3 1.0 0.016 1584.70 2.76 At baffle wall Stage 2 3 12.0 2.356 1587.65 5.25 At baffle wall Main 1 36 7.069 1583.40 0 At headwall Outlet Baffle Wall Weir (Stage 3) Invert Weir elev. Crest L (FT) above Elev. bottom (MSL) (ft) 6.0 8.10 1590.00 Basin #3 is designed to maintain a minimum freeboard of 1.0' and maximum freeboard of 2.0' from the spillway crest elevation. Table 15 provides a summary of the basin detention performance. K: \265324\Final\llydro1ogy\12cport\324 Report 13ody.doex - 22 -