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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /><ross <br />Section <br />Number <br /> <br />Genera I <br />Strecrn <br />Thalwe9 <br />sta. Elev. <br /> <br />56621 50+00 <br />58251 51+80 <br />63451 57+00 <br /> <br />65111 58+60 <br /> <br />67661 61+25 <br />73791 67+25 <br />77811 71+35 <br />79011 73+70 <br /> <br />80441 74+80 <br /> <br />851 81 76+95 <br /> <br />96551 85+20 <br />98351 86+90 <br /> <br />98951 87+50 <br /> <br />80.9 <br />81.1 <br />83.0 <br />83.9 <br />84.5 <br />86.4 <br />87.9 <br />90.0 <br />90.8 <br />91.8 <br />98.2 <br />98.6 <br /> <br />100681 89+25 5301.4 <br /> <br />99.7 <br /> <br />100891 94+85 <br />113301 100+90 <br /> <br />03.3 <br />06.8 <br /> <br />TABLE IV-2 (cont.) <br />FLOODPLAIN AND FLOODWAY INFORMATION <br />RALSTON CREEK (cont.) <br /> <br />100-Year <br />Discharge <br />cfs <br /> <br />1 00- Year <br />Water Sur. <br />Elev. <br /> <br />100-Year Floodplain <br />Floodplain Floodplain <br />Top Width Velocity <br />(ft) Cft/sec) <br /> <br />Floodway <br />water Surf. <br />EI@vatton <br /> <br />100-Year Floodway 1/2' Rise <br />Floodway Floodway* Floodway <br />Top Width WIdth Velocity <br />(ft) LT. RT. (ft/sec) <br /> <br />100-Year Floodway I' Rise <br />Floodway Floodway Floodway* Floodway <br />Water Surf. Top Width Width Velocity <br />Elevation (ft) LT. RT. (ft/see) <br /> <br />co I NC I DENT WITH FLOODPLA I N NO ENCROAC~ENT <br /> <br /> <br />COINCIOENT WITH FLOODPLAIN NO ENCROAC~ENT <br /> <br /> <br />COiNCIDENT WITH FLOODPLAIN NO ENCROACHMENT <br /> <br />coiNCIDENT WITH FLOODPLAIN NO ENCROAC~ENT <br /> <br />410 <br />490 <br />405 <br />405 <br /> <br />475 <br /> <br />510 <br />270 <br />335 <br />575 <br />560 <br /> <br />150 <br />280 <br /> <br />* As measured from design channel centerline, looking in the downstream direction. <br /> <br />9,800 <br /> <br />5292.6 <br /> <br />685 <br />580 <br /> <br />';293.1 <br />93.1 <br /> <br />145 <br />215 <br />200 <br />225 <br />245 <br />410 <br />195 <br />365 <br />380 <br /> <br />290 <br /> <br />25 <br />150 <br /> <br />265 <br /> <br />275 <br /> <br />205 <br /> <br />180 <br />230 <br />100 <br /> <br />-30 <br />195 <br />270 <br /> <br />105 <br /> <br />130 <br /> <br />330 <br />390 <br />270 <br />310 <br />370 <br />145 <br />95 <br />105 <br />515 <br /> <br />540 <br /> <br />110 <br />225 <br /> <br />350 <br /> <br />290 <br /> <br />5 <br />100 <br /> <br />110 <br />170 <br />85 <br />145 <br />155 <br />45 <br />30 <br />135 <br /> <br />220 <br />220 <br />185 <br />165 <br /> <br />215 <br /> <br />100 <br />65 <br />-30 <br />165 <br />250 <br /> <br />IV-7 <br /> <br />5 <br />9 <br />12 <br />7 <br />5 <br />12 <br />10 <br />10 <br />4 <br />6 <br /> <br />COINCIDENT WITH FLOODPLAIN NO ENCROACHMENT <br />co I NC I DENT WITH FLOOOPlA I N NO ENCROAC~ENT <br />COINCIDENT WITH FLOODPLAIN NO ENCROAC~ENT <br />COINCIDENT WITH FLOODPLAIN NO ENCROAC~ENT <br /> <br />105 <br />125 <br /> <br />15 <br />13 <br /> <br />Note: Floodway descriptions of "1/2' Rise" and "I' Rise" represent maximum increases in the Energy Grade Line Elevation and not necessarily the water <br />surface elevation. <br /> <br />9,800 <br /> <br />92.6 <br /> <br />9,800 <br />9.800 <br /> <br />94.5 <br /> <br />95.5 <br />97.2 <br /> <br />9,800 <br /> <br />9,800 <br /> <br />97,7 <br />98.9 <br />98.9 <br />5306.5 <br />06.6 <br />08.8 <br />12.2 <br /> <br />9,800 <br /> <br />9,300 <br />9,300 <br /> <br />9,300 <br /> <br />9,300 <br /> <br />9,300 <br /> <br />9,300 <br /> <br />12.5 <br />12.4 <br /> <br />9,300 <br /> <br />9,300 <br />9,300 <br /> <br />14.9 <br /> <br />19.4 <br /> <br />5 <br />9 <br />11 <br />6 <br /> <br />740 <br /> <br />94.4 <br /> <br />95.9 <br />97.7 <br /> <br />730 <br />740 <br />670 <br /> <br />5 <br /> <br />98.2 <br /> <br />11 <br />10 <br /> <br />99.1 <br /> <br />305 <br /> <br />470 <br />1475 <br /> <br />99.0 <br />';307.1 <br />07.2 <br /> <br />11 <br /> <br />4 <br /> <br />735 <br /> <br />6 <br /> <br />100 <br />100 <br />130 <br />375 <br />330 <br />460 <br /> <br />14 <br /> <br />7 <br />6 <br />9 <br />12 <br />11 <br /> <br />14.8 <br />19.2 <br /> <br />5 <br />9 <br />12 <br />6 <br /> <br />5293.5 <br /> <br />93.5 <br /> <br />94.8 <br />96.3 <br /> <br />5 <br /> <br />98.0 <br />98.3 <br /> <br />11 <br /> <br />75 <br /> <br />10 <br /> <br />99.7 <br /> <br />11 <br /> <br />5300 .0 <br /> <br />4 <br />6 <br /> <br />07.6 <br /> <br />07.7 <br /> <br />13 <br />13 <br /> <br />14.6 <br />19.4 <br />