City of Balch Springs Hickory Creek Flood Protection Planning Study Final Report Page: Table E.3
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Table E.3: HEC-RAS Plan: Hickory Creek Existing vs Ultimate Water Surface Elevations
Existing vs Ultimate Water Surface Elevations
Existing Ultimate Difference
River Reach River Sta Profile Min Ch El QTotal W.S. Elev QTotal W.S. Elev Q Total W.S. Elev
(ft) (cfs) (ft) (cfs) (ft) (cfs) (ft)
Stream 4C6 3 12286* 0.2% Annual Chan 479.74 750 483.82 750 483.8 0 0.0
Stream 4C6 3 12138 50% Annual Chanc 478.75 150 481.27 175 481.44 25 0.2
Stream 4C6 3 12138 20% Annual Chanc 478.75 275 482.02 275 482.02 0 0.0
Stream 4C6 3 12138 10% Annual Chanc 478.75 325 482.26 350 482.36 25 0.1
Stream 4C6 3 12138 4% Annual Chance 478.75 450 482.75 450 482.75 0 0.0
Stream 4C6 3 12138 2% Annual Chance 478.75 500 482.91 500 482.91 0 0.0
Stream 4C6 3 12138 1% Annual Chance 478.75 550 483.07 600 483.2 50 0.1
Stream 4C6 3 12138 0.4% Annual Chan 478.75 650 483.35 700 483.47 50 0.1
Stream 4C6 3 12138 0.2% Annual Chan 478.75 750 483.61 750 483.61 0 0.0
Stream 4C6 3 12100 Bridge Bridge
Stream 4C6 3 12078 50% Annual Chanc 477.72 150 479.81 175 479.96 25 0.1
Stream 4C6 3 12078 20% Annual Chanc 477.72 275 480.45 275 480.45 0 0.0
Stream 4C6 3 12078 10% Annual Chanc 477.72 325 480.82 350 481.01 25 0.2
Stream 4C6 3 12078 4% Annual Chance 477.72 450 481.33 450 481.63 0 0.3
Stream 4C6 3 12078 2% Annual Chance 477.72 500 481.62 500 481.72 0 0.1
Stream 4C6 3 12078 1% Annual Chance 477.72 550 482.02 600 482 50 0.0
Stream 4C6 3 12078 0.4% Annual Chan 477.72 650 482.43 700 482.41 50 0.0
Stream 4C6 3 12078 0.2% Annual Chan 477.72 750 482.47 750 482.57 0 0.1
Stream 4C6 3 11996.7* 50% Annual Chanc 476.92 150 478.98 175 479.11 25 0.1
Stream 4C6 3 11996.7* 20% Annual Chanc 476.92 275 479.58 275 480.16 0 0.6
Stream 4C6 3 11996.7* 10% Annual Chanc 476.92 325 480.67 350 480.89 25 0.2
Stream 4C6 3 11996.7* 4% Annual Chance 476.92 450 481.21 450 481.55 0 0.3
Stream 4C6 3 11996.7* 2% Annual Chance 476.92 500 481.52 500 481.63 0 0.1
Stream 4C6 3 11996.7* 1% Annual Chance 476.92 550 481.95 600 481.92 50 0.0
Stream 4C6 3 11996.7* 0.4% Annual Chan 476.92 650 482.37 700 482.34 50 0.0
Stream 4C6 3 11996.7* 0.2% Annual Chan 476.92 750 482.39 750 482.5 0 0.1
Stream 4C6 3 11915.5* 50% Annual Chanc 476.12 150 478.12 175 478.25 25 0.1
Stream 4C6 3 11915.5* 20% Annual Chanc 476.12 275 479.61 275 480.19 0 0.6
Stream 4C6 3 11915.5* 10% Annual Chanc 476.12 325 480.7 350 480.91 25 0.2
Stream 4C6 3 11915.5* 4% Annual Chance 476.12 450 481.24 450 481.58 0 0.3
Stream 4C6 3 11915.5* 2% Annual Chance 476.12 500 481.56 500 481.67 0 0.1
Stream 4C6 3 11915.5* 1% Annual Chance 476.12 550 481 99 600 481.96 50 0.0
Stream 4C6 3 11915.5* 0.4% Annual Chan 476.12 650 482.43 700 482.4 50 0.0
Stream 4C6 3 11915.5* 0.2% Annual Chan 476.12 750 482.47 750 482.58 0 0.1
Stream 4C6 3 11834.2* 50% Annual Chanc 475.32 150 477.25 175 477.37 25 0.1
Stream 4C6 3 11834.2* 20% Annual Chanc 475.32 275 479.72 275 480.26 0 0.5
Stream 4C6 3 11834.2* 10% Annual Chanc 475.32 325 480.77 350 480.99 25 0.2
Stream 4C6 3 11834.2* 4% Annual Chance 475.32 450 481.35 450 481.67 0 0.3
Stream 4C6 3 11834.2* 2% Annual Chance 475.32 500 481.66 500 481.77 0 0.1
Stream 4C6 3 11834.2* 1% Annual Chance 475.32 550 482.08 600 482.08 50 0.0
Stream 4C6 3 11834.2* 0.4% Annual Chan 475.32 650 482.53 700 482.52 50 0.0
Stream 4C6 3 11834.2* 0.2% Annual Chan 475.32 750 482.6 750 482.7 0 0.1
Stream 4C6 3 11751 50% Annual Chanc 474.52 150 477.49 175 477.5 25 0.0
Stream 4C6 3 11751 20% Annual Chanc 474.52 275 479.75 275 480.27 0 0.5
Stream 4C6 3 11751 10% Annual Chanc 474 52 325 480.78 350 481 25 0.2
Stream 4C6 3 11751 4% Annual Chance 474.52 450 481.35 450 481.67 0 0.3
Stream 4C6 3 11751 2% Annual Chance 474.52 500 481.67 500 481.77 0 0.1
Stream 4C6 3 11751 1% Annual Chance 474.52 550 482.09 600 482.09 50 0.0
Stream 4C6 3 11751 0.4% Annual Chan 474.52 650 482.53 700 482.53 50 0.0
Stream 4C6 3 11751 0.2% Annual Chan 474.52 750 482.6 750 482.7 0 0.1
Stream 4C6 3 11383 50% Annual Chanc 472.96 150 477.49 175 477.49 25 0.0
Stream 4C6 3 11383 20% Annual Chanc 472.96 275 479.75 275 480.27 0 0.5
Stream 4C6 3 11383 10% Annual Chanc 472.96 325 480.78 350 481 25 0.2
Stream 4C6 3 11383 4% Annual Chance 472.96 450 481.35 450 481.67 0 0.3
Stream 4C6 3 11383 2% Annual Chance 472.96 500 481.67 500 481.77 0 0.1
Stream 4C6 3 11383 1% Annual Chance 472.96 550 482.09 600 482.09 50 0.0
Stream 4C6 3 11383 0.4% Annual Chan 472.96 650 482.53 700 482.52 50 0.0
Stream 4C6 3 11383 0.2% Annual Chan 472.96 750 482.6 750 482.7 0 0.1
Stream 4C6 3 11124 50% Annual Chanc 471.89 150 477.47 150 477.47 0 0.0
Stream 4C6 3 11124 20% Annual Chanc 471.89 250 479.73 275 480.26 25 0.5
Stream 4C6 3 11124 10% Annual Chanc 471.89 325 480.76 350 480.98 25 0.2
Stream 4C6 3 11124 4% Annual Chance 471.89 400 481.33 450 481.64 50 0.3
Stream 4C6 3 11124 2% Annual Chance 471.89 450 481.64 500 481.74 50 0.1
Stream 4C6 3 11124 1% Annual Chance 471.89 550 482.05 550 482.05 0 0 0
Stream 4C6 3 11124 0.4% Annual Chan 471.89 650 482.53 650 482.52 0 0 0
Stream 4C6 3 11124 0.2% Annual Chan 471.89 700 482.6 750 482.7 50 0.1
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Halff Associates. City of Balch Springs Hickory Creek Flood Protection Planning Study Final Report, report, July 29, 2011; Richardson, Texas. (https://texashistory.unt.edu/ark:/67531/metapth838691/m1/392/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.