Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE A-I <br />HYDROLOGICAL AND HYDRAULIC ANAL YSIS <br /> <br />Name <br /> <br />FUCHS <br /> <br />Location <br /> <br />Sections 2 and 11, Township 37 North, Ranqe 4 East <br /> <br /> W. Div. 3 H. l1ist. 20 <br />A. Hydroloqic l1ata <br /> Drainaqe Area 2.78 sq.mi. 1,780 ac res <br /> Lenqth of Watercourse 3.03 m;. ; Rise of Watershed 2,110 ft. <br /> Tc = 0.49 hours Tc1Tc = 2.0 hours Tc1 = 0.98 hours <br /> Hazard Low Size Class (USFS) C <br /> SDF (USFS) 100 year SDF (SED) 100 year <br /> Soil Group A, B & C Infiltration Rates 0.25 in/hr. <br /> <br />Curve Number (CN) <br /> <br />CN <br /> <br />74 <br /> <br />, AMC II I <br /> <br />55 <br /> <br />, AMC II; <br /> <br />100-Year <br /> <br />2.3 <br /> <br />B <br /> <br />,6-Hour, Zone <br /> <br />Thunderstorms <br /> <br />2.0 <br /> <br />,I-Hour, Zone <br /> <br />II <br /> <br />Thunderstorm CN 74 <br /> <br />Thunderstorm 10-Minute Retention Loss Rate 0.06 <br /> <br />B. Hydraulic Data <br /> <br />QP (6-hr 100-yr) <br />QP (18-hr 100-yr) <br />QP (Thunderstorm) <br /> <br />542 cfs; Routed outflow 188 cfs; * 1.5' freeboard <br />997 cfs; Routed outflow >370 cfs; *overtop <br />662 cfs; Routed outflow 304 cfs; *1.2' freeboard <br /> <br />The above data is based upon the procedure in the U.S.B.R.'s Desiqn of <br />Small Dams, second edition. <br /> <br />100-Year -- The distribution of rainfall for first phase is in accordance <br />with Fiqure 18, Zone B. The depth-area-duration relationship is in accordance <br />with Fiqure 16, Zone N/A. The arranqement of the rainfall is in accordance with <br />Item 3(c), Paqe 76. ---- <br /> <br />Thunderstorm -- The storm is distributed in accordance with Table 2, Paqe <br /> <br />52, Zone II. The desiqn thunderstorm precipitation <br />in accordance with Table A-8, Appendix A, Zone II. <br />made usinq Fiqure 21. ---- <br /> <br />15-minute time sequence is <br />The area adjustment is <br /> <br />* Existinq Spillway <br />