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 QTotal W.S. Elev
(ft) (cfs) (ft) (cfs) (ft) (cfs) (ft)
Hickory Trib 4 1 3766 10% Annual Chanc 469.95 350 472.98 375 473.04 25 0.1
Hickory Trib 4 1 3766 4% Annual Chance 469.95 450 473.19 450 473 18 0 0.0
Hickory Trib 4 1 3766 2% Annual Chance 469.95 500 473.28 550 473.38 50 0.1
Hickory Trib 4 1 3766 1% Annual Chance 469.95 600 473.47 600 473.47 0 0.0
Hickory Trib 4 1 3766 0.4% Annual Chan 469.95 700 473.65 700 473.65 0 0.0
Hickory Trib 4 1 3766 0.2% Annual Chan 469.95 800 473.81 800 473.81 0 0.0
Hickory Trib 4 1 3243 50% Annual Chanc 467.3 150 469.01 200 469.25 50 0.2
Hickory Trib 4 1 3243 20% Annual Chanc 467.3 275 469.57 300 469.65 25 0.1
Hickory Trib 4 1 3243 10% Annual Chanc 467.3 350 469.79 375 469.84 25 0.0
Hickory Trib 4 1 3243 4% Annual Chance 467.3 450 469.99 450 470 0 0.0
Hickory Trib 4 1 3243 2% Annual Chance 467.3 500 470.07 550 470.13 50 0.1
Hickory Trib 4 1 3243 1% Annual Chance 467.3 600 470.19 600 470.19 0 0.0
Hickory Trib 4 1 3243 0.4% Annual Chan 467.3 700 470.29 700 470.28 0 0.0
Hickory Trib 4 1 3243 0.2% Annual Chan 467.3 800 470.37 800 470.36 0 0.0
Hickory Trib 4 1 2325 50% Annual Chanc 461.48 150 464.17 200 464.51 50 0.3
Hickory Trib 4 1 2325 20% Annual Chanc 461.48 275 464.78 300 464.89 25 0.1
Hickory Trib 4 1 2325 10% Annual Chanc 461.48 350 465.06 375 465.15 25 0.1
Hickory Trib 4 1 2325 4% Annual Chance 461.48 450 465.39 450 465.37 0 0.0
Hickory Trib 4 1 2325 2% Annual Chance 461.48 500 465.52 550 465.68 50 0.2
Hickory Trib 4 1 2325 1% Annual Chance 461.48 600 465.82 600 465.82 0 0.0
Hickory Trib 4 1 2325 0.4% Annual Chan 461.48 700 466.11 700 466.11 0 0.0
Hickory Trib 4 1 2325 0.2% Annual Chan 461.48 800 466.38 800 466.39 0 0.0
Hickory Trib 4 1 1814 50% Annual Chanc 459.09 150 461.48 200 461.8 50 0.3
Hickory Trib 4 1 1814 20% Annual Chanc 459.09 275 462.44 300 462.55 25 0.1
Hickory Trib 4 1 1814 10% Annual Chanc 459.09 350 462.87 375 462.98 25 0.1
Hickory Trib 4 1 1814 4% Annual Chance 459.09 450 463.33 450 463.52 0 0.2
Hickory Trib 4 1 1814 2% Annual Chance 459.09 500 463.72 550 463.81 50 0.1
Hickory Trib 4 1 1814 1% Annual Chance 459.09 600 464.08 600 464.17 0 0.1
Hickory Trib 4 1 1814 0.4% Annual Chan 459.09 700 464.49 700 464.55 0 0.1
Hickory Trib 4 1 1814 0.2% Annual Chan 459.09 800 464.82 800 464.89 0 0.1
Hickory Trib 4 1 1418 50% Annual Chanc 455.44 450 460.1 550 460.49 100 0.4
Hickory Trib 4 1 1418 20% Annual Chanc 455.44 825 461.34 875 461.46 50 0.1
Hickory Trib 4 1 1418 10% Annual Chanc 455.44 1025 461.84 1075 461.96 50 0.1
Hickory Trib 4 1 1418 4% Annual Chance 455.44 1250 462.36 1350 462.57 100 0.2
Hickory Trib 4 1 1418 2% Annual Chance 455.44 1450 462.78 1500 462.88 50 0.1
Hickory Trib 4 1 1418 1% Annual Chance 455.44 1650 463.16 1700 463.26 50 0.1
Hickory Trib 4 1 1418 0.4% Annual Chan 455.44 1950 463.42 2000 463.47 50 0.1
Hickory Trib 4 1 1418 0.2% Annual Chan 455.44 2200 463.65 2250 463.72 50 0.1
Hickory Trib 4 1 907 50% Annual Chanc 453.14 450 457.29 550 457.73 100 0.4
Hickory Trib 4 1 907 20% Annual Chanc 453.14 825 458.68 875 458.88 50 0.2
Hickory Trib 4 1 907 10% Annual Chanc 453.14 1025 459.37 1075 459.48 50 0.1
Hickory Trib 4 1 907 4% Annual Chance 453.14 1250 459.77 1350 459.89 100 0.1
Hickory Trib 4 1 907 2% Annual Chance 453.14 1450 459.99 1500 460.06 50 0.1
Hickory Trib 4 1 907 1% Annual Chance 453.14 1650 460.18 1700 460.22 50 0.0
Hickory Trib 4 1 907 0.4% Annual Chan 453.14 1950 460.99 2000 461.04 50 0.1
Hickory Trib 4 1 907 0.2% Annual Chan 453.14 2200 461.23 2250 461.24 50 0.0
Hickory Trib 4 1 565 50% Annual Chanc 451.75 450 456.24 550 456.79 100 0.6
Hickory Trib 4 1 565 20% Annual Chanc 451.75 825 457.99 875 458.27 50 0.3
Hickory Trib 4 1 565 10% Annual Chanc 451.75 1025 458.92 1075 459.08 50 0.2
Hickory Trib 4 1 565 4% Annual Chance 451.75 1250 459.39 1350 459.52 100 0.1
Hickory Trib 4 1 565 2% Annual Chance 451.75 1450 459.61 1500 459.67 50 0.1
Hickory Trib 4 1 565 1% Annual Chance 451.75 1650 459.81 1700 459.83 50 0.0
Hickory Trib 4 1 565 0.4% Annual Chan 451.75 1950 460.02 2000 460.06 50 0.0
Hickory Trib 4 1 565 0.2% Annual Chan 451.75 2200 460.19 2250 460.22 50 0.0
Hickory Trib 4 1 500 Culvert Culvert
Hickory Trib 4 1 481 50% Annual Chanc 450.72 450 455.88 550 456.32 100 0.4
Hickory Trib 4 1 481 20% Annual Chanc 450.72 825 456 85 875 456.97 50 0.1
Hickory Trib 4 1 481 10% Annual Chanc 450.72 1025 457.2 1075 457.27 50 0.1
Hickory Trib 4 1 481 4% Annual Chance 450.72 1250 457.52 1350 457.67 100 0.2
Hickory Trb 4 1 481 2% Annual Chance 450.72 1450 457.81 1500 457.89 50 0.1
Hickory Trib 4 1 481 1% Annual Chance 450.72 1650 458.06 1700 458.16 50 0.1
Hickory Trib 4 1 481 0.4% Annual Chan 450.72 1950 458.48 2000 458.58 50 0.1
Hickory Trib 4 1 481 0.2% Annual Chan 450.72 2200 458.85 2250 458.94 50 0.1
Hickory Trib 4 1 327.5* 50% Annual Chanc 450.03 450 455.53 550 456.05 100 0.5
Hickory Trib 4 1 327.5* 20% Annual Chanc 450.03 825 456.56 875 456.7 50 0.1
Hickory Trib 4 1 327.5* 10% Annual Chanc 450.03 1025 456.91 1075 457.08 50 0.2
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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/m1/397/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.