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<br /> TABLE 4 - FLOODPLAIN AND FLOODWAY REFERENCE DATA
<br />I DIRECT FLOW AREA 0054-1
<br /> Cross 100-Yr Stream 100- Yr Floodplain Floodway Width1 Controlli21g Floodway Notes
<br />I Location Section Station Discharge Bed Elev. Flood Elev. Width Left Right Total Criteria Elev.
<br /> Number (cfs) (msl) (msl) (ft) (ft) (ft) (ft) (ms))
<br /> Confluence with South 5 5+75 1,865 5,038.0 5,040.3 271 21 248 269 a 5,040.3
<br />I Platte River 10 10+60 1,850 5,043.3 5,047.0 122 78 44 122 a 5,047.0
<br /> 15 15+75 1,850 5,047.4 5,050.6 863 391 139 530 a 5,050.6
<br /> 20 20+93 1,825 5,053.7 5,056.2 1,364 533 120 653 a 5,056.2
<br /> 25 26+15 1,810 5,056.9 5,058.2 1,059 373 241 614 c 5,058.7
<br />I 30 30+44 1,780 5,059.0 5,060.2 1,252 456 420 876 a 5,060.2
<br /> 35 35+10 1,750 5,062.0 5,062.8 965 566 172 738 a 5,062.8
<br /> 40 36+48 1,740 5,064.1 5,065.7 1,042 586 103 689 c 5,066.2
<br />I 45 38+68 1,725 5,066.6 5,067.5 1,144 831 -40 791 a 5,067.5
<br /> 50 41 +00 1,710 5,068.9 5,070.3 1,364 651 216 867 c 5,070.5 Floodway encroachment limited
<br /> to defined channel banks
<br /> 55 43+82 1,690 5,071.0 5,072.2 823 215 353 568 a 5,072.2
<br />I 60 48+32 1,650 5,076.7 5,078.2 770 296 328 624 a 5,078.2
<br /> 65 51 +60 1,635 5,080.7 5,081.8 528 182 239 421 a 5,081.8
<br /> 70 54+43 1,610 5,085.3 5,086.8 385 -66 205 139 a 5,086.8
<br />I 72 55+26 1,610 5,090.0 5, 091. 7 196 9 187 196 a 5,091. 7
<br />Lower Clear Creek 75 55+40 1,600 5,092.0 5,093.4 434 91 210 301 a 5,093.4
<br /> Canal 80 57+36 1,580 5,094.9 5,096.9 379 39 196 235 a 5,096.9
<br />I 90 58+44 1,570 5,095.9 5,097.9 392 81 267 348 a 5,097.9
<br />Riverdale Road 100 58+93 1,560 5,100.3 5,101.7 347 103 244 347 a 5,101.7
<br /> 110 59+45 1,560 5,100.9 5,102.7 332 78 237 315 a 5,102.7
<br /> 120 62+22 1,500 5,103.9 5,106.6 188 82 79 161 a 6,106.6
<br />I 130 65+47 1,410 5,109.3 5,111.2 152 64 88 152 a 5,111.2
<br />Holly Street 140 65+90 1,410 5,119.6 5,121.0 262 121 52 173 c 5,121.1 Floodway encroachment limited
<br /> Colorado Agric. Canal to defined channel banks
<br />I 150 66+37 1,470 5,117.8 5,121.7 301 147 124 271 c 5,121.9 " " " " "
<br />Lower Medema Pond 160 66+65 1,470 5,119.0 5,121.7 251 143 108 251 c 5,121.7 No encroachment detention pond
<br /> 170 67+22 1,470 5,111.9 5,122.0 259 155 104 259 c 5,122.0 " " " " "
<br /> 180 70+95 1,470 5,114.2 5,121.9 108 77 31 108 c 5,121.9 " " " " "
<br />I Upper Medema Pond 190 71 +75 1,520 5,125.3 5,128.4 237 142 95 237 c 5,128.4 " " " " "
<br /> 200 72+18 1,500 5,119.4 5,129.1 250 133 117 250 c 5,129.1 " " " " "
<br /> 210 76+10 1,460 5,123.9 5,129.1 158 58 100 158 c 5,129.1 " " " " "
<br />I 220 77+75 1,295 5,137.9 5,141.6 252 20 96 116 c 5,142.1
<br /> 230 80+56 1,200 5,144.0 5,150.8 238 41 22 66 c 5,151.3
<br /> 240 82+07 1,180 5,147.4 5,154.1 37 16 21 37 c 5,154.1 Floodway confined in channel banks
<br />I 250 82+90 1,180 5,149.7 5,156.4 58 23 22 45 c 5,156.5 Floodway encroachment limited to
<br /> defined channel banks
<br />E. 112th Avenue 270 84+80 1,075 5,154.2 5,161.1 Flow turns right angle at cross-
<br />I section; No widths given
<br /> 280 86+94 1,030 5,159.7 5,163.4 184 9 82 91 c 5,163.4 Floodway encroachment limited to
<br /> defined channel banks
<br /> 290 90+65 955 5,165.8 5,168.7 214 10 131 141 c 5,169.2
<br />I 300 93+21 930 5,167.1 5,169.2 229 26 113 139 c 5,169.7
<br />Cherry Drive 301 95+00 890 5,174.9 5,176.0 279 38 167 205 c 5,176.5 415 cfs in E. 112th Way - 110 cfs
<br /> accommodated by storm sewer
<br />I 305 95+60 885 5,176.2 5,178.5 345 8 152 160 c 5,179.0 400 cfs in E. 112th Way - 110 cfs
<br /> accommodated by storm sewer
<br />1- Floodway Widths are measured from channel reference lines looking downstream.
<br /> 2. Controlling Criteria: (a) Velocities at floodway Ii mits are equal to <X' greater than 2 feet per second.
<br />I (b) Depths are greater than 18".
<br /> (c) Water surface raised 1/2 ft. based on equal encroachment.
<br /> NOTE: Controlling criteria a and b apply to Adams County only.
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