Phase A - Alternatives Analysis Report - Urban Drainage and Flood ...

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PHASE A – ALTERNATIVES ANALYSIS REPORTMajor Drainageway Planning Update for Hidden Lake-Bates LakeTable 5-6: Reach B-1 Alternative Cost Estimates5.5.5 Reach B-1This reach extends from the Bates Lake watershed headwaters, near the intersection of Price Street and 67 thAvenue, to the intersection of Sheridan Boulevard and the Union Pacific Railroad.Alternative 1: No Drainageway ImprovementsAs previously discussed, the purpose of this alternative is to maintain the existing channel and crossingstructures without implementing additional improvements to increase conveyance or improve flood proneareas. It does consider general routine, restorative and rehabilitation maintenance of the existing channel andfacilities. The annual costs of maintenance have been estimated based on the facilities within the reach.Alternative 2a & 4a: Regional DetentionThis alternative constructs a formal outlet for the existing detention basin in Homestead Park, named BatesLake.Alternative 2b & 4c: Regional Detention & Water QualityThis alternative constructs a 2.8 Acft regional detention basin north of the Union Pacific Railroad tracks atthe extension of Depew Street west of Sheridan Boulevard and provides water quality within the detentionbasin. This detention basin detains all of the 100-year storm event that exceeds the capacity proposed pipesunder the railroad tracks, which will extend to Clear Creek, at the extension of Depew Street and at SheridanBoulevard.Alternative 3a: Improved ConveyanceThis alternative replaces the existing 36-inch pipe under the Union Pacific Railroad tracks at the extensionof Depew Street with a 60-inch pipe. The new 60-inch pipe under the railroad tracks will connect to theexisting 60-inch pipe just south of the railroad tracks.Alternative PlanBates Lake WatershedStructuralImprovementsTrafficControlUtilityRelocationsPropertyAcquisitionEngineering,CM, &ContingenciesOperation &MaintenanceAlternativeTotalREACH B-1: Watershed Headwaters to Railroad Tracks at Sheridan Boulevard1a Do nothing $0 $0 $0 $0 $0 $20,000 $20,0002a2b4c3a3b4bConstruct a formaloutlet in Bates Lake /Homestead Park.Construct a regionaldetention basin northof the railroad tracksat the extension ofDepew St.Upsize the pipesunder the railroadtracks along theextension of DepewSt. and alongSheridan Blvd.Build an end of thepipe water qualitybasin east ofSheridan Blvd.$33,600 $1,680 $0 $0 $11,760 $4,000 $51,040$145,373 $0 $7,269 $108,000 $50,880 $9,000 $320,522$598,883 $59,888 $59,888 $0 $209,609 $17,000 $945,269$415,905 $0 $0 $13,726 $145,567 $13,000 $588,198Alternative 3b: Improved ConveyanceThis alternative replaces the existing undersized pipe under the Union Pacific Railroad tracks and alongSheridan Boulevard all the way to Clear Creek.Alternative 4b: Water QualityThis alternative constructs an 11.5 Acft regional water quality pond east of Sheridan Boulevard north ofClear Creek.5-12
18HiddenLakeWADSWORTH BD1830X1953LAMAR ST48362121W 64TH AV30PIERCE ST189621TENNYSON STW 62ND AV15SHERIDAN BD4248WOLFF ST18WADSWORTH BDW 60TH AV15301868X4368X433618122418W 56TH AV0X0780X015241818W 66TH AV1272B-1: 2aFormalize outletat Bates LakeW 61ST PLJim BakerReservoirI-76e k361818363036r C r eC l e a301815181827633HARLAN ST15B-1: 2b & 4cRegional detentionwith water quality8B-1: 3aUpsize 36" pipeB-1: 3bImproved conveyanceunder the railroad tracksand along Sheridanunderneath the railroad B-1: 4bWater quality pond24546010121218153636UNION PACIFIC RAILROAD815Clear Creek1812603621424818W 58TH AV36W68THAV3630480X0240X00X0240X0 0X0360X0240X00X00X00X0302418OBERON RD54UNION PACIFIC RAILROADslaRkC r et o ne1524LegendHEC-RAS Centerline18Major Basin72BURLINGTON NORTHERN SANTA FESecondary BasinCounty BoundaryExisting Storm PipeBatesLake66Inundated Building Footprint15Proposed Detention845X29Proposed ConveyanceProposed Water Quality1224100-Year Floodplain0 500 1,000FeetFIGURE 5-5BATES LAKE REACH B-1ALTERNATIVES ANALYSIS5-13FILE: \\Tartarus\gis\gis_projects\UDFCD_Hidden_Lake\08.155.006\active\apps\HiddenLake_Reach_B-1_Map.mxd, 7/25/2008, chris_martin
Page 1 and 2: MAJOR DRAINAGEWAY PLANNINGUPDATE FO
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Page 17 and 18: CP I E R C E S TW A D S W O R T H B
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Page 25 and 26: Figure 3-3 Hidden Lake Peak Dischar
Page 27 and 28: 450400350Sheriden Blvd.North of Rai
Page 35 and 36: 48121830X1948W 76TH AV2724818242415
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Page 39 and 40: LegendHEC-RAS CenterlineMajor Basin
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Page 45 and 46: 1230TENNYSON ST9624SHERIDAN BDWOLFF
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Page 57 and 58: LegendHEC-RAS CenterlineMajor Basin
Page 59 and 60: 18HiddenLake18WADSWORTH BD1830X1953
Page 63 and 64: APPENDIX AMeeting MinutesPHASE A -
Page 73 and 74: APPENDIX BHydrologic AnalysisPHASE
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Page 89 and 90: APPENDIX CHydraulic AnalysisPHASE A
Page 91 and 92: Table C-1 HEC-RAS Summary TablePHAS
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Table C-1 HEC-RAS Summary TablePHAS
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PHASE A - ALTERNATIVES ANALYSIS REP
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Jim Baker Reservoir SpillwayPHASE A
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APPENDIX DLegal OpinionPHASE A - AL
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APPENDIX EEnvironmental InventoryPH
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APPENDIX FDamage AnalysisPHASE A -
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