FLOOD08613

• County: Adams
• Community: Thornton
• Stream Name: Brantner Gulch
• Basin: South Platte
• Title: Flood Hazard Area Delineation
• Date: 1/1/1983
• Prepared For: Adams County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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LOCATION FLOOD PLAIN DATA: FLOODWAY DATA: 100- YEAR 31
100 -YEAR
I 100 YEAR THALWEG2 WATER MEAN WATER TOP DISTANCE,::'l DISTANCE 4 MEAN
SECTION STATION DESCRIPTION DISCHARGE SURFACE TOP VELOCITY SURFACE VELOCITY
NUMBER (CFS) ELEVATION ELEVATION WIDTH (FT.) (FT./SEC.l ELEVATION WIDTH (FT.) LEFT (FT.) RIGHT (FT.) (FT./SEC.)
MAIN CHANNEL - CONT'D
2060 252+50 2500 5168.5 5172,7 148 6.4 5173.3 100 55 45 6.2
2050 239+40 2500 5164.3 5169,4 152 6.7 5169,5 100 45 55 8.7
2040 236+80 2500 5162.2 5166.5 164 7.1 5167.1 100 88 12 6.6
2030 234+50 2500 5159.7 5163.8 147 6.9 5163,9 100 50 50 9.0
2020 232+20 2500 5157.3 5161.4 165 6.5 5161.7 105 50 55 6.5
2010 228+80 2500 5153.1 5157,7 180 6.3 5157.6 110 55 55 8.3
2000 226+45 2500 5146,1 5153.7 87 9,4 5154.1 90 45 45 9.0
1990 223+80 2500 5143.2 5150.2 126 8.6 5150.2 70 50 20 10.6
1980 221+05 2500 5138.5 5145.8 100 8.7 5145.8 65 35 30 10.8
1970 218+65 2500 5134.7 5143.8 135 6.4 5144.3 80 35 45 6.6
1960 215+70 3500 5131. 0 5140,6 135 9.1 5140.8 60 45 15 10.5
1950 213+30 3500 5129.3 5138.4 150 8.0 5138.9 85 40 45 8.0
1940 209+90 3500 5127.5 5135,3 150 8.5 5135.4 85 35 50 9.9
1930 207+55 3900 5127.0 5133.8 158 7.6 5134,0 115 35 80 7.9
1920 205+20 4000 5127.0 5133,1 195 5.2 5133.5 150 95 55 5.2
1910 202+45 4200 5125.7 5132.8 300 3.5 5133,2 190 65 125 3.7
1900 202+15 Holly Street 4200 5128,5 5131.6 315 7.8 5131.7 180 65 115 9.1
1890 201+85 4200 5125.3 5129.8 283 8.5 5129.8 175 65 110 9.2
1880 197+60 4200 5119.6 5124,1 328 4.7 5124.2 170 90 80 6.2
1870 194+00 4200 5117.3 5121. 6 194 7.3 5121.9 150 35 115 7.0
1860 191+60 4200 5115.4 5119.2 195 7,5 5119.4 140 10 130 8.1
1850 189+25 4200 5111.9 5117 .1 240 6.0 5117.4 160 10 150 6.4
1840 187+00 4200 5110.8 5114.6 202 7.4 5114.8 140 25 115 8.2
1830 185+00 4200 5106.7 5112.2 176 7.8 5112.6 125 15 110 8,1
1820 182+50 4200 5105.1 5110,8 190 5,6 5111.1 120 10 110 6.5
1810 180+ 70 4200 5104.2 5108.8 170 8.2 5109.0 115 45 70 9.1
1800 179+10 4200 5101.9 5106.7 145 8.2 5107.2 120 50 70 8.0
1790 175+40 4200 5100.0 5104,2 238 5.5 5104.4 155 25 130 6.6
1780 173+30 Confluence With Tributary III 4200 5098,8 5103.6 369 3.7 5103.8 250 115 1-35 4.2
TABLE 3 FLOOD HAZARD AREA DELINEATION
CONSut.,"I..a ~ SELLARDS & GRIGG. INC. TABULAR FLOOD PLAIN AND FLOOD WAY DATA URBAN DRAINAGE AND FLOOD CONTROL DISTRICT
CN'QI..1I: 1[l1li"
1145 W. 1.0. AVt...U! . COTTOfolWOOO 'LAZ... I CITY OF THORNTON
LAKlWOOO, COLOI'lAOO 10215 2J1-U" BRANTNER GULCH
ADAMS COUNTY