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I I I I I I I I I I I I I I I I I I I FLOODING SOURCE FLOOD PLAIN DATA FLOODWAY DATAl) . CROSS STATION Q100 STREAM 100- YR 1 00- YR FLOODWAY WIDTH (FT)(2) FLOODWAY IDENTIFICATION' BED ELEV. FLOOD ELEV. ELEV, SECTION (FT) (CFS) (MSl.) (MSl.) WIDTH (FT) L BANK R BANK TOTAL (MSl.) - , 97 346+00 1780 5822.2 5841.0 407.6 98 348+60 1780 5825.8 5841 .0 280.4 99 351+00 1780 5829.7 5841 .0 109.0 100 353+00 1780 5832.7 5840.9 82.2 101 354+62 1780 5835.6 5840.9 79.9 Upstream Limit of Backwater 102 356+00 1780 5837.6 5841 .8 91 .2 Effects Due to Culvert at Station 342+00 North Highlands Loop - 8egin 143 549+40 937 5694.8 5720.0 564.2 Backwater Condition Due to 144 553+00 925 5702.8 5720.0 337.3 Culvert 145 556+60 925 5709.7 5720.0 150.2 146 558+34 925 5714.0 5719.8 29.7 Upstream Limit of Backwater 147 561+20 925 5720.8 5725.6 33.3 Effects Due to Culvert at Station 549+40 Broadway - Begin Backwater 226 833+20 1776 5577.7 5616.0 379.3 Condition Due to Culvert 227 837+20 1347 5591 .7 5616.0 274.2 228 840+60 1347 5598.4 5616.0 133.7 229 841+85 1347 5603.0 5616.0 131 .6 230 843+00 1347 5605.0 5615.7 39.0 Upstream Limit of Backwater 231 847+40 1347 5617.5 5624 . 0 33.4 Effects Due to Culvert at Station 833+20 (1) Floodway data are based on encroachment causing up to 0.5 ft. vertical rise in the 100-year flood eleva'tion. Where floodway data are not given they shall be assumed to be identical to the flood plain data. (2) Lef,t and right distances are measured from the center of the flowl ine of the channel looking downstream. REVISED 10-9-80 6>OCSOl~~""*""! (-.GtlWOOC'. u_>.~lO"'": URBAN DRAINAGE AND FLOOD CONTROL DISTRICT FLOOD HAZARD AREA DELINEATION DOUGLAS COUNTY FLOOD PLAIN AND FLOODWAY REFERENCE DATA CONT, IJ Jock ~~~~~ ~~pony DAD CLARK GULCH TABLE 4 SHEET B