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' • Table 1, North Breach • <br />Rating Table for Irregular Channel <br />Northern Breach <br />Irregular Channel <br />Manntng'S Formula <br />Channel Depth <br />Project Description <br />Worksheet <br />Flow Element <br />Method <br />Solve For <br />Input Data <br />Slope 0.001500 Wfl <br />Options <br />Current Roughness Method Improved Lottefs Method <br />Open Channel Weighting Metho Improved Lottefs Method <br />Closed Channel Weighting Meth Horton's Method <br />Attribute Minimum Maximum Increment <br />Discharge (cfs) 1,000.00 6,500.00 500.00 <br />Discharge <br />(cfs) Water <br />Surface <br />Elevahon <br />(ft) Velocity <br />(ftls) Flow <br />Area <br />(tt') Wetted <br />Perimeter <br />(tl) Top <br />Width <br />(tt) <br />1,000 00 4.23 3.21 311.8 114 47 112.28 <br />1,500.00 5.03 372 4031 118.36 11564 <br />2,000.00 5.76 410 487.7 123.82 12061 <br />2,500.00 6.62 4.14 603.7 151.06 147 35 <br />3.000.00 7.62 3.82 785.5 221.90 217 76 <br />3.500.00 7.99 4.05 865.1 224.15 219.90 <br />4,000.00 8.34 4.24 943.5 227.90 223 54 <br />4,500.00 8.69 440 1,023.3 233.95 229.52 <br />5,00000 9.03 4.54 1,100.6 23967 235.17 <br />5,50000 9.34 4.68 1,175.9 24511 240.54 <br />6,000.00 9.65 4.80 1,249.4 250.30 245.67 <br />6.500.00 9.93 4.92 1,320.1 254.74 250.00 <br />Notes: <br />Manntngs "n" was assumed to be 0.035 <br />The top of bank is equal to 9.9 feet <br />Flow overtops the levee a[ a flow of 6500 cfs <br />North Breach location is shown on Figure 3 3 <br />Protect Engineer Brian Wood <br />c'Utaeslatl\fmwlcoll102 fm2 Litlstane and Associates FlowMaster v6.1 [614k[ <br />1 t/30/01 0840:19 AM m Haestad Methods, Inc. 37 Brookside Roatl Waterbury, CT 06708 USA (203) 755-1666 Page t o! 1 <br />