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<br />I <br />I <br />I <br />'. <br />I <br />I <br />I <br />'. <br />I <br />I <br />. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />IV-10 <br /> <br /> TABLE IV-2 (cont. ) <br /> FLOODPLAIN AND FLOODWAY INFORMATION <br /> RALSTON CREEK (cont.) <br /> General lOO-Year Floodplain 100-Year Floodway 1/2' Rise 100-Year Floodway l' Rise <br />Cross Stream 1 00- Year 1 00- Year Floodplain Floodplain Floodway Floodway Floodway* Floodway Floodway Floodway Floodway* Floodway <br />Section Thalweg DIscharge Water Sur. Top Width Velocity Water- Surf. Top Width Width Velocity Water Surf. Top Width Width Velocity <br />Number Sta. Elev. cfs Elev. ( ft) 1ft/see) ElevatIon (ft) LT. RT. (ft/sec) Elevation (ft) LT. RT. (ft/see) <br />250001 230+30 5388.9 6,800 5400.2 1,380 6 5400.6 445 165 280 6 5400.4 335 120 215 7 <br />256101 236+40 95.1 6,800 03.7 990 11 03.8 510 445 65 12 04.1 410 370 40 13 <br />259101 239+40 96.2 6,800 05.7 990 11 06.0 570 530 40 12 06,1 400 360 40 12 <br />260901 240+65 96.8 6,200 06.6 1,060 12 06.9 620 575 45 13 07.2 405 385 20 13 <br />261351 241+85 97.7 6,200 07.1 960 12 07.4 555 525 30 13 07.4 380 350 30 13 <br />261911 242+25 98.3 6,200 09.0 790 11 09.2 425 410 15 11 09.1 275 265 10 13 <br />264311 244+50 5401.1 6,200 11.0 615 10 10.8 250 170 80 12 10,4 85 50 35 14 <br />271381 251+60 08.5 6,200 14.2 1,070 7 14.7 440 330 110 6 15.2 375 280 95 6 <br />278831 258+35 14.2 6,200 19.0 190 9 19.7 175 10 165 8 19.3 155 0 155 11 <br /> <br />* As measured from design channel centerline, lookinq in the downstream direction. <br /> <br />Note: Floodway descriptions of "1/2' Rise" and "1' Rise" represent maximum increases in the Energy Grade Line Elevation and not necessarily the water <br />surface elevation. <br />