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HomeMy WebLinkAboutF216-00-00 IN-LINE DETENTION BASINGalveston Bay WatershedTable 1 Unit Hydrograph Parameters for Updated Hydrologic ModelWatershed Length (mi.)Length to Centroid(mi.)Channel Slope(ft./mi)Overland Slope(ft./mi.)Percent Urban Development 2002Percent Channel ImprovementPercent Channel ConveyancePercent PondingDLU affected by DetentionL Lca S So DLU DCI DCC DPP DETF21601A364.20.569 1.93 0.944.115.682.4676.311001000 0.00 59.26 2.56 0.462 2.09417.5976.31F216A1047.71.637 2.86 1.067.125.532.4643.0326300 0.70 30.38 7.61 0.749 6.86395.4343.03F216B1394.90.617 1.32 0.365.5010.132.4659.3163800 0.00 57.65 2.60 0.211 2.38524.0659.31F216B2382.70.598 1.98 0.685.5010.132.4659.3163800 0.00 50.64 3.46 0.411 3.04524.0659.31F216C42.20.066 0.57 0.40 1.91 6.572.4629.2701000 0.00 23.52 2.72 0.618 2.10717.5929.27DLU (Detention)DLU MinimumR''TC''FEMA Effective Model as of June 18, 2007TC&R values for FEMA Effective ModelSubwatershedDrainage Area (acres)Drainage Area (sq.mi.)(TC+R)''Percent Impervious 2002DT1_TC&R F216 Profile 0.20 0.40 0.60 0.80 1.00 1.20 1.50Outflow (cfs) 272 544 816 1088 1360 1632 2040Storage (ac-ft) 10.32 17.96 24.91 35.98 56.77 90.34 144.17Average Travel Time (hrs) 0.50 0.44 0.41 0.44 0.54 0.69 0.88Hydrograph Travel Time K (hrs) 0.33 0.29 0.27 0.29 0.36 0.46 0.59Reach Routing Steps NSTPSOutflow (cfs) 560 1120 1679 2239 2799 3359 4199Storage (ac-ft) 28.65 48.24 64.03 79.39 104.81 154.60 235.08Average Travel Time (hrs) 0.99 0.85 0.75 0.69 0.73 0.90 1.07Hydrograph Travel Time K (hrs) 0.66 0.57 0.50 0.46 0.49 0.60 0.71Reach Routing Steps NSTPSTable 2 Reach Routing Data for Updated Hydrologic Model74F2160000_0082_RF2160000_0015_RRouting ReachRouting Data Profile 0.20 0.40 0.60 0.80 1.00 1.20 1.50Outflow (cfs) 272 544 816 1088 1360 1632 2040Storage (ac-ft) 38.23 78.06 118.63 137.80 156.62 180.47 223.08Average Travel Time (hrs) 1.51 1.64 1.69 1.47 1.34 1.29 1.26Hydrograph Travel Time K (hrs) 1.01 1.09 1.13 0.98 0.89 0.86 0.84Reach Routing Steps NSTPSTable 3 Reach Routing Data for Proposed In-Line Detention Basin13F2160000_0082_DRouting ReachRouting Data Table 4 Comparison of Peak Flows between FEMA and Updated Hydrologic ModelsUHM FHM Diff. UHM FHM Diff. UHM FHM Diff.F2160000_0122_J Main St. 570 570 0 855 855 0 1004 1004 0F2160000_0015_J South Broadway St. 1318 1236 83 1946 1831 115 2232 2082 150F2160000_0021_J Park Dr. 1718 1609 109 2537 2379 158 2909 2724 185F2160000_0005_J At Month 1762 1649 113 2604 2440 164 2988 2799 190Notes: UHM = Updated Hydrologic Model; FHM = FEMA Hydrologic Model; Diff = UHM - FHMHEC-HMS Node2%10% 1%Location Table 5 Comparison of Peak Flows between Revised and Updated Hydrologic ModelsUHM RHM Diff. UHM RHM Diff. UHM RHM Diff.F2160000_0122_J Main St. 570 570 0 855 855 0 1004 1004 0F2160000_0015_J South Broadway St. 1318 1065 -253 1946 1651 -295 2232 2064 -168F2160000_0021_J Park Dr. 1718 1409 -309 2537 2091 -446 2909 2577 -332F2160000_0005_J At Month 1762 1455 -307 2604 2163 -440 2988 2634 -355Notes: UHM = Updated Hydrologic Model; RHM = Revised Hydrologic Model; Diff = RHM - UHMHEC-HMS Node2%10% 1%Location Table 6 Comparison of Computed Water Surface Elevations between FEMA Effective and Pre-project Condition Models ECM FEM Diff. ECM FEM Diff. ECM* FEM Diff. ECM FEM Diff. 16666.65 12.59 19.08 19.08 0.00 20.52 20.54 -0.02 21.02 20.99 0.03 21.12 21.11 0.01 16612.63 12.51 19.03 19.03 0.00 20.46 20.47 -0.01 21.02 20.99 0.03 21.11 21.11 0.00 16453.34 SPTC RR 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 16294.05 12.04 18.45 18.46 -0.01 19.13 19.14 -0.01 19.48 19.49 -0.01 20.23 20.24 -0.01 16239.12 11.96 18.45 18.46 -0.01 19.15 19.16 -0.01 19.51 19.52 -0.01 20.23 20.24 -0.01 15662.67 11.1 18.27 18.28 -0.01 19.01 19.03 -0.02 19.40 19.41 -0.01 20.15 20.16 -0.01 15609.67 11.01 18.25 18.25 0.00 18.99 19.01 -0.02 19.38 19.39 -0.01 20.14 20.15 -0.01 15580.45 North 16th St. 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 15551.24 10.91 18.09 18.11 -0.02 19.00 19.02 -0.02 19.39 19.40 -0.01 20.14 20.15 -0.01 15493.04 10.81 18.05 18.07 -0.02 18.97 18.99 -0.02 19.36 19.37 -0.01 20.12 20.13 -0.01 15368.24 10.6 18.01 18.03 -0.02 18.94 18.96 -0.02 19.33 19.34 -0.01 20.10 20.11 -0.01 15276.72 10.45 17.91 17.93 -0.02 18.77 18.79 -0.02 19.12 19.14 -0.02 20.09 20.10 -0.01 15253.54 Barbours Cut Blvd 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 15230.36 10.37 17.87 17.89 -0.02 18.65 18.67 -0.02 18.94 18.95 -0.01 19.47 19.48 -0.01 15158.08 10.25 17.85 17.88 -0.03 18.67 18.69 -0.02 18.98 18.99 -0.01 19.45 19.46 -0.01 14131.39 8.45 17.29 17.33 -0.04 18.12 18.15 -0.03 18.45 18.48 -0.03 18.95 18.98 -0.03 13151.4 8.14 16.75 16.82 -0.07 17.72 17.79 -0.07 18.14 18.19 -0.05 18.62 18.66 -0.04 12285.23 6.57 16.13 16.24 -0.11 17.21 17.34 -0.13 17.77 17.85 -0.08 18.23 18.31 -0.08 12213.19 6.49 16.07 16.18 -0.11 17.13 17.25 -0.12 17.65 17.82 -0.17 18.20 18.28 -0.08 12138.43 Spencer Highway 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12063.67 6.32 15.85 15.98 -0.13 16.96 17.07 -0.11 17.37 17.47 -0.10 18.19 18.27 -0.08 11962.65 6.2 15.75 15.87 -0.12 16.88 16.99 -0.11 17.29 17.37 -0.08 18.10 18.18 -0.08 11103.33 5.22 15.15 15.25 -0.10 16.33 16.43 -0.10 16.80 16.87 -0.07 17.72 17.80 -0.08 10051.04 4.39 14.27 14.32 -0.05 15.47 15.52 -0.05 15.96 15.98 -0.02 16.94 16.98 -0.04 8905.061 2.79 12.85 12.84 0.01 14.28 14.29 -0.01 14.82 14.78 0.04 15.98 15.96 0.02 8551.573 2.1 12.15 12.11 0.04 13.75 13.74 0.01 14.32 14.24 0.08 15.58 15.54 0.04 8249 1.52 11.30 11.19 0.11 13.16 13.12 0.04 13.75 13.63 0.12 15.21 15.14 0.07 8208.269 1.44 11.35 11.24 0.11 13.19 13.16 0.03 13.79 13.67 0.12 15.23 15.16 0.07 7970.648 SH 146 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 7733.031 0.53 11.31 11.20 0.11 13.07 13.05 0.02 13.62 13.51 0.11 14.88 14.82 0.06 7679.985 0.43 11.21 11.11 0.10 12.98 12.96 0.02 13.53 13.42 0.11 14.82 14.76 0.06 7404.07 0.43 11.11 11.00 0.11 12.89 12.87 0.02 13.44 13.32 0.12 14.72 14.66 0.06 7222.301 0.41 11.02 10.90 0.12 12.81 12.78 0.03 13.35 13.23 0.12 14.64 14.56 0.08 6759.369 -0.16 10.79 10.66 0.13 12.60 12.57 0.03 13.14 13.00 0.14 14.45 14.36 0.09 6699.486 -0.3 10.77 10.64 0.13 12.58 12.55 0.03 13.12 12.98 0.14 14.44 14.34 0.10 6659.565 -0.4 10.76 10.63 0.13 12.57 12.54 0.03 13.11 12.97 0.14 14.43 14.33 0.10 6602.855 Fairmont Parkway 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6546.143 -0.52 10.71 10.57 0.14 12.49 12.37 0.12 13.09 12.94 0.15 14.26 14.14 0.12 6500.687 -0.63 10.69 10.56 0.13 12.48 12.36 0.12 13.07 12.92 0.15 14.25 14.12 0.13 6445.129 -0.76 10.66 10.53 0.13 12.45 12.33 0.12 13.04 12.89 0.15 14.22 14.10 0.12 5777.244 -1.06 10.50 10.36 0.14 12.29 12.17 0.12 12.89 12.74 0.15 14.11 13.98 0.13 5733.993 -1.06 10.49 10.35 0.14 12.28 12.16 0.12 12.89 12.73 0.16 14.10 13.98 0.12 5699.263 South 8th St. 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5664.537 -1.06 10.46 10.33 0.13 12.25 12.13 0.12 12.86 12.70 0.16 14.00 13.96 0.04 5615.555 -1.06 10.45 10.32 0.13 12.25 12.13 0.12 12.83 12.70 0.13 13.97 13.92 0.05 5380.519 -0.67 10.37 10.24 0.13 12.16 12.04 0.12 12.76 12.62 0.14 13.92 13.87 0.05 5255.402 -1.99 10.16 10.03 0.13 11.98 11.86 0.12 12.59 12.44 0.15 13.79 13.73 0.06 4475.84 -3.03 8.66 8.47 0.19 10.55 10.36 0.19 11.21 10.98 0.23 12.58 12.48 0.10 3384.195 -3.79 6.36 6.12 0.24 7.97 7.71 0.26 8.60 8.30 0.30 10.08 9.85 0.23 2707.204 -5.03 5.49 5.26 0.23 6.93 6.68 0.25 7.49 7.21 0.28 8.88 8.63 0.25 2123.56 -3.89 4.86 4.65 0.21 6.24 6.00 0.24 6.79 6.52 0.27 8.17 7.91 0.26 2021.986 -3.89 4.72 4.50 0.22 6.09 5.85 0.24 6.64 6.38 0.26 8.02 7.76 0.26 1979.236 South Broadway 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1936.482 -3.89 4.52 4.31 0.21 5.89 5.65 0.24 6.43 6.16 0.27 7.80 7.53 0.27 1834.6 -3.89 4.34 4.13 0.21 5.70 5.46 0.24 6.24 5.98 0.26 7.64 7.36 0.28 1452.611 -4.51 3.80 3.60 0.20 5.13 4.89 0.24 5.67 5.41 0.26 7.05 6.77 0.28 538.677 at Mouth -4.36 3.33 3.13 0.20 4.66 4.42 0.24 5.21 4.95 0.26 6.60 6.32 0.28 ECM = Pre-project /Existing Condition Model; FEM = FEMA Effective Model; Diff = ECM-FEM AEP = Annual Exceedance Probability 10% AEP 2% AEP 1% AEP 0.2% AEP HEC-RAS Station FlowlineLocation Computed Water Surface Elevations (ft) Table 7 Comparison of Computed Water Surface Elevations between Pre-project and Post-project Condition Models PCM ECM Diff. PCM ECM Diff. PCM* ECM Diff. PCM ECM Diff. 16666.65 12.59 19.07 19.08 -0.01 20.47 20.52 -0.05 21.00 21.02 -0.02 21.11 21.12 -0.01 16612.63 12.51 19.01 19.03 -0.02 20.40 20.46 -0.06 21.00 21.02 -0.02 21.11 21.11 0.00 16453.34 SPTC RR 16294.05 12.04 18.44 18.45 -0.01 19.08 19.13 -0.05 19.42 19.48 -0.06 20.23 20.23 0.00 16239.12 11.96 18.44 18.45 -0.01 19.09 19.15 -0.06 19.44 19.51 -0.07 20.23 20.23 0.00 15662.67 11.1 18.25 18.27 -0.02 18.94 19.01 -0.07 19.32 19.40 -0.08 20.15 20.15 0.00 15609.67 11.01 18.23 18.25 -0.02 18.92 18.99 -0.07 19.31 19.38 -0.07 20.14 20.14 0.00 15580.45 North 16th St. 15551.24 10.91 18.04 18.09 -0.05 18.93 19.00 -0.07 19.31 19.39 -0.08 20.14 20.14 0.00 15493.04 10.81 17.99 18.05 -0.06 18.90 18.97 -0.07 19.28 19.36 -0.08 20.12 20.12 0.00 15368.24 10.6 17.95 18.01 -0.06 18.87 18.94 -0.07 19.25 19.33 -0.08 20.10 20.10 0.00 15276.72 10.45 17.85 17.91 -0.06 18.69 18.77 -0.08 19.04 19.12 -0.08 20.09 20.09 0.00 15253.54 Barbours Cut Blvd 15230.36 10.37 17.81 17.87 -0.06 18.61 18.65 -0.04 18.86 18.94 -0.08 19.46 19.47 -0.01 15158.08 10.25 17.79 17.85 -0.06 18.62 18.67 -0.05 18.90 18.98 -0.08 19.45 19.45 0.00 14131.39 8.45 17.17 17.29 -0.12 18.03 18.12 -0.09 18.29 18.45 -0.16 18.88 18.95 -0.07 13151.4 8.14 16.52 16.75 -0.23 17.51 17.72 -0.21 17.83 18.14 -0.31 18.49 18.62 -0.13 12285.23 6.57 15.70 16.13 -0.43 16.81 17.21 -0.40 17.15 17.77 -0.62 17.99 18.23 -0.24 12213.19 6.49 15.61 16.07 -0.46 16.71 17.13 -0.42 17.04 17.65 -0.61 17.93 18.20 -0.27 12138.43 Spencer Highway 12063.67 6.32 15.30 15.85 -0.55 16.38 16.96 -0.58 16.81 17.37 -0.56 17.74 18.19 -0.45 11962.65 6.2 15.15 15.75 -0.60 16.23 16.88 -0.65 16.67 17.29 -0.62 17.60 18.10 -0.50 10600.58 In-Line Detention 4.48 13.88 15.13 15.60 16.48 8551.573 2.1 11.74 12.15 -0.41 13.37 13.75 -0.38 14.14 14.32 -0.18 15.58 15.58 0.00 8249 1.52 10.65 11.30 -0.65 12.65 13.16 -0.51 13.53 13.75 -0.22 15.22 15.21 0.01 8208.269 1.44 10.71 11.35 -0.64 12.70 13.19 -0.49 13.57 13.79 -0.22 15.24 15.23 0.01 7970.648 SH 146 7733.031 0.53 10.68 11.31 -0.63 12.59 13.07 -0.48 13.41 13.62 -0.21 14.89 14.88 0.01 7679.985 0.43 10.57 11.21 -0.64 12.49 12.98 -0.49 13.32 13.53 -0.21 14.83 14.82 0.01 7404.07 0.43 10.45 11.11 -0.66 12.39 12.89 -0.50 13.22 13.44 -0.22 14.73 14.72 0.01 7222.301 0.41 10.34 11.02 -0.68 12.30 12.81 -0.51 13.13 13.35 -0.22 14.65 14.64 0.01 6759.369 -0.16 10.08 10.79 -0.71 12.08 12.60 -0.52 12.91 13.14 -0.23 14.46 14.45 0.01 6699.486 -0.3 10.05 10.77 -0.72 12.06 12.58 -0.52 12.89 13.12 -0.23 14.45 14.44 0.01 6659.565 -0.4 10.03 10.76 -0.73 12.04 12.57 -0.53 12.88 13.11 -0.23 14.44 14.43 0.01 6602.855 Fairmont Parkway 6546.143 -0.52 9.96 10.71 -0.75 11.92 12.49 -0.57 12.83 13.09 -0.26 14.27 14.26 0.01 6500.687 -0.63 9.94 10.69 -0.75 11.91 12.48 -0.57 12.81 13.07 -0.26 14.26 14.25 0.01 6445.129 -0.76 9.91 10.66 -0.75 11.88 12.45 -0.57 12.78 13.04 -0.26 14.23 14.22 0.01 5777.244 -1.06 9.73 10.50 -0.77 11.70 12.29 -0.59 12.62 12.89 -0.27 14.12 14.11 0.01 5733.993 -1.06 9.72 10.49 -0.77 11.69 12.28 -0.59 12.62 12.89 -0.27 14.11 14.10 0.01 5699.263 South 8th St. 5664.537 -1.06 9.69 10.46 -0.77 11.66 12.25 -0.59 12.59 12.86 -0.27 14.01 14.00 0.01 5615.555 -1.06 9.68 10.45 -0.77 11.65 12.25 -0.60 12.58 12.83 -0.25 13.97 13.97 0.00 5380.519 -0.67 9.59 10.37 -0.78 11.56 12.16 -0.60 12.50 12.76 -0.26 13.93 13.92 0.01 5255.402 -1.99 9.37 10.16 -0.79 11.36 11.98 -0.62 12.32 12.59 -0.27 13.79 13.79 0.00 4475.84 -3.03 7.81 8.66 -0.85 9.84 10.55 -0.71 10.87 11.21 -0.34 12.59 12.58 0.01 3384.195 -3.79 5.61 6.36 -0.75 7.28 7.97 -0.69 8.20 8.60 -0.40 10.06 10.08 -0.02 2707.204 -5.03 4.81 5.49 -0.68 6.27 6.93 -0.66 7.08 7.49 -0.41 8.83 8.88 -0.05 2123.56 -3.89 4.23 4.86 -0.63 5.59 6.24 -0.65 6.34 6.79 -0.45 8.09 8.17 -0.08 2021.986 -3.89 4.09 4.72 -0.63 5.43 6.09 -0.66 6.18 6.64 -0.46 7.94 8.02 -0.08 1979.236 South Broadway 1936.482 -3.89 3.92 4.52 -0.60 5.22 5.89 -0.67 5.96 6.43 -0.47 7.70 7.80 -0.10 1834.6 -3.89 3.75 4.34 -0.59 5.03 5.70 -0.67 5.76 6.24 -0.48 7.53 7.64 -0.11 1452.611 -4.51 3.25 3.80 -0.55 4.46 5.13 -0.67 5.17 5.67 -0.50 6.94 7.05 -0.11 538.677 -4.36 2.78 3.33 -0.55 3.99 4.66 -0.67 4.71 5.21 -0.50 6.50 6.60 -0.10 *ECM = Pre-project/Existing Condition Model; PCM = Post-project Condition Model; Diff = PCM-ECM AEP = Annual Exceedance Probability HEC-RAS Station Flowline 1% AEP2% AEPLocation Computed Water Surface Elevations (ft) 0.2% AEP10% AEP §¨¦10 §¨¦45 §¨¦610 §¨¦10§¨¦10§¨¦10 £¤59 £¤290 £¤290 £¤59 UV6 UV321 ³ EXHIBIT 1VICINITY MAP F216-00-00INLINE DETENTION BASIN October 18, 2011 1 inch = 8 miles PROJECT LOCATION W MAIN ST SH 146 S SH 146S 8TH STS 16TH STS 4TH STS 6TH STW MAIN ST S 7TH STS 5TH STS 3RD STW A ST W G ST W B ST W FAIRMONT PKWY W C ST W E ST W F STN SH 146N 8TH STN 7TH STN 6TH STN 5TH STN 4TH STN 16TH STN 3RD STW I STN 11TH STW TYLER ST S 11TH STW ADAMS ST S 4THS 17TH STW K ST W POLK ST S 14TH STS 15TH STS 12TH STW L ST W H ST W D ST N 13TH STN 12TH STSH 146S 13TH STN 17TH STN 18TH STN SH 146-SH 146;MAIN NN 14TH STS SH 146-SH 146;MAI N SW E S SH 146-SH 146; FAIRMONT SN 15TH STS SH146-SH146 S SH146-SH146N 14TH STN SH 146W E ST S SH 146S SH 146S SH 146S 17TH STW K ST W POLK ST S 14TH STW B ST W C ST N SH 146N SH 146W ADAMS ST W L ST W B ST W D STF216-00-00A104-07-00PROJECT LOCATION 1 inch = 800 feet­ SPENCER HIGHWAY STATE HIGHWAY 146EXHIBIT 2PROJECT LOCATION MAP F216-00-00INLINE DETENTION BASIN October 18, 2011 1 inch = 800 feet 818616142012102224262830 323418 1814 20 1616 141 8 121218 1 4 141616121420 181618 10 20 2610 1618 10 18 1612 12 161222 10 18 12 18 1014 141 8 1 41414 18 2 0 1214 16 1014 1420 12161618 1218122 0 161618 14222016 1416 10162014 12 1 4 16 1414101418 16 1414 22 16 1416202018 181018 12 1420 1 4 3022 1616 1 6 12201812 1 4 1 218 1 01816 101822161214 12 14 141414 1218 142018141612 1218 14 101 4 1214 101 412 12101 0 18 161214 16 16122 2181216182 0 122 0 16201812141820 18161814 18141416 1214121216 16 1 4 1 8 14 12161620 162018 1016141414 12181818 1 21416 14 1414 18 12 1412 1 6 16 162024 161214 12 14 18 1618 161 414 1218 16181414 1220161416 1416141618 16 16 1212142018 1618 1 4 141 481 4162014 12141816 16 261814 141220 16 16 14 12181 212 14 12 161416 14 14 1420161414 1 4 20 1 8 1218 18141416141612 102014181 41422 10 22 10 101414101418 1218 168 16 142018 1816 14 16 201620 201 412 1414141416 1 412 121818181418 121 418 1412281 414121 61 6 14 181 618 141612 1 6 14 1 6 1214 20 1 8 101020 14 24142016 14 1 4 12 16 1012 18 12 1216 1620181814142018 14 12181816 16141412161614161418 12 10F216A F216B1 F216B2 F21601A F216C S SH 146W MAIN ST S 8TH STS 16TH STN SH 146S 4TH STS 6TH STS 3RD STN 16TH STS 1ST STS 7TH STS 2ND STS 5TH STSENS RDBAY AREA BLVDS BROADWAY STW G ST W A ST W B ST W C STN 11TH STW F ST W E ST N BROADWAY STW FAIRMONT PKWY N L ST N 1ST STN 5TH STN 6TH STN 4TH STN 8TH STN 3RD STW I ST AVE C W TYLER ST W ADAMS ST POWELL RDOLD HWY 146N 13TH STN 12TH STW BARBOURS CUT BLVD E B STN 7TH STS 4THE C STTEXAS STN 2ND STS 11TH STE G STE ST E L ST 23RD STS A N J A CIN T O D R OREGON AVEA RIZ O N A S T W MADISON ST S VIR GINIA S TE M AIN STS IO WA S T W K STS 17TH STMONTANAE D STW POLK ST FAIRLANE S 14TH STS 15TH STFOREST AVEN 14TH STW L ST S 12TH STGARFIELD ST W H ST W D ST S K A N S A S S T SH 146S 8 T H E BARBOURS CUT BLVD GA RDEN WALK DR E POLK STSOUTHE FAIRMONT PKWY LITTLE CEDAR BAYOU DR E H STS 13TH STN SH 146-SH 146;MAIN NN 18TH STN U T A H S T W M STS SH 146-SH 146;MAI N SW E S SH 146-SH 146;FAIRMONT SE A STN SH 146-SH 146;BARBOURS CUT NE M ST S SH146-SH146N SH 146W K STN SH 146W L ST N L ST N 12TH STS SH 146W D ST W E ST W POLK ST S SH 146S 17TH STS SH 146S SH 146E ST W E ST W C ST S 14TH STBAY AREA BLVDN SH 146W TYLER ST E A STW B ST N SH 146-SH 146;MAI N N864 2020-2 16141210 22 26 18 30 24 32 28 343638404244 18 1422 6201416 1022 14 1422 18302014 16 3822 18 16 18 16 18 20 22 20 1024 181 8 12 181618 201820 16 161220 1418 18 1 2 14 1630 16 182 2 12 16 2018 20 18 20 121618 10 20 181820142014 22 14 6 18 12 22 22 261818 12 20 1418 32 16 18 1222 221612 18 2 2 18201220 1816 1816 1 814186 22 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22, 2011 1 inch = 1,000 feet Exhibit 5 Schematic of Revised HEC-HMS Model 8962.68752.68623.68551.579955.6410325.69502.59111 62.6 11 6 9 0 .6 8249.00106 00 .58 112 22 .63 8208.2711365.55 1 3 1 5 1 .4 0 11962.65 7679.987733.037404.0712063.67 12285.23 12213.19 5777.245733.995664.5414131.397222.305615.566759.376546.146699.496659.566500.69 6445.135380.5215158.0815230.3615276.7215368.245255.4015493.0415609.6715662.6716239.12S SH 146S 8TH STS 16TH STS 6TH STS 7TH STW MAIN ST W FAIRMONT PKWY N SH 146N 8TH STN 7TH STN 6TH STS 11TH STN 16TH STN 11TH STW A ST W G ST W B ST S 17TH STW K ST W C ST W TYLER ST W E ST W F ST W ADAMS ST W POLK ST S 14TH STS 15TH STS 12TH STW L ST W H ST W D ST SH 146FAIRMONT PKWY S 13TH STN 13TH STN 17TH STN 12TH STN 18TH STN 14TH STN SH 146-SH 146;MAIN NS SH 146-SH 146;MAI N SW E S SH 146-SH 146; FAIRMONT SS SH 146-SH 146;FAIRMONT SS SH146-SH146 W K STS 14TH STW B ST S SH 146N SH 146W B STS 17TH STN 14TH STW POLK ST W D ST S SH 146N SH 146W TYLER ST W ADAMS ST W POLK ST W H ST W A ST W A ST W C ST W L ST W C ST W E ST S SH 146N SH 146N 12TH STF216-00-00A104-07-00Legend Channel Cross Section HCFCD Channel Project Location 1 inch = 500 feet­ EXHIBIT 6 CHANNELCROSS SECTION ALIGNMENT F216-00-00INLINE DETENTION BASIN October 23, 2011 1 inch = 500 feet F216-00-00 LINEAR DETENTION & Ü Ü Ü & ENGINEER'S CERTIFICATION FLOOD PLAIN STATUS FLOOD CONTROL DISTRICT CRITERIA DESCRIPTION OF PROPERTY HCPID SIGNATURE BLOCK COMMERCIAL / OTHER SITE DRAINAGE WATER AND WASTEWATER HARRIS COUNTY PUBLIC INFRASTRUCTURE DEPARTMENT EXPRESS REVIEW SHEET HARRIS COUNTY FLOOD CONTROL DISTRICT ENGINEERING DIVISION PAVING DRIVEWAYS TRAFFIC CONSIDERATIONS RESIDENTIAL / SUBDIVISION DRAINAGE1.3.4.5.2. 7. 8. CURBING FIRE APPARATUS ACCESS ROAD CURB RAMPS / SIDEWALK 11 **** 6.STORM WATER QUALITY ** ** WORK IN HCFCD RIGHT-OF-WAY9. LANDSCAPING 12 PERMITS REQUIRED10. * * * WORK IN HARRIS COUNTY R.O.W. & PROFESSIONAL SURVEYORS FAX (713) 869-1541 1702 SEAMIST DRIVE, SUITE #320, HOUSTON, TEXAS 77008 PHONE (713) 869-0155 PROFESSIONAL SURVEYORS FAX (713) 869-1541 1702 SEAMIST DRIVE, SUITE #320, HOUSTON, TEXAS 77008 PHONE (713) 869-0155 PROFESSIONAL SURVEYORS FAX (713) 869-1541 1702 SEAMIST DRIVE, SUITE #320, HOUSTON, TEXAS 77008 PHONE (713) 869-0155 & & & & & & & & 9900 Northwest FreewayHouston, Texas 77092 SWPPP CSN 9900 Northwest FreewayHouston, Texas 77092 9900 Northwest FreewayHouston, Texas 77092 & & & & & & & & &