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

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Hidden Lake Reach 2Parcel IDAddressActual Valuation(in dollars)Type Source CommentPHASE A – ALTERNATIVES ANALYSIS REPORTMajor Drainageway Planning Update for Hidden Lake-Bates Lake0182506213014 4839 W 69th Ave Westminster 194,111 Residential Adams County Assessor 3 23.00% $44,646194,111 $44,646Hidden Lake Reach 3NoneHidden Lake Reach 4Parcel IDAddressActual Valuation(in dollars)Type Source Comment0182508211002 Unknown 158,127 Residential Adams County Assessor Assessed as a pair 3 23.00% $36,3690182508211002 Unknown 0 Residential Adams County Assessor Assessed as a pair (no value added) 3 23.00% $0158,127 $36,369Grand Total Valuation: 21,468,360*Note: Jefferson County Assessor's residential valuations are both property and structure. All other valuations are structure only.Depth ofFlooding(in feet)Depth ofFlooding(in feet)%Damage%DamageDamageDamage
PHASE A – ALTERNATIVES ANALYSIS REPORTMajor Drainageway Planning Update for Hidden Lake-Bates LakeTable F-7 Sheridan Boulevard @ W. 69th Avenue Loss of FunctionTable F-8 Lowell Boulevard @ W. 66th Avenue Loss of FunctionTable F-9 Tennyson Street @ Union Pacific Railroad Loss ofFunctionAvg DailyTraffic* Total Peak Hour**Avg DailyTraffic*Total PeakHour*Avg DailyTraffic*Total PeakHour*41,100 4,110 9,688 1,059 4,630 439South Bound Detour: South Bound Detour: South Bound Detour:Start at Sheridan Blvd. & 72nd Ave. - West on 72nd Ave. - South on Lamar St. -East on 66th Ave - End at Sheridan Blvd. & 66th Ave.Start at Lowell Blvd. & 67th Ave. - East on 67th Ave. - South on Federal Blvd. -West on 64th Ave - End at Lowell Blvd. & 64th Ave.Start at Tennyson St. & 60th Ave. - West on 60th Ave. - South on SheridanBlvd. - East on 52nd Ave - End at Tennyson St. & 52nd Ave.Detour Length: Detour Length: Detour Length:2.26 mi 1.37 mi 2.00 miAt a 25mph detour speed; Travel time on the detour will take approximately 5.4minutes however, there will be traffic backing up and vehicle drivers will not knowexactly what detour to take. Therefore, the total detour time is assumed to be 20minutes.*Sheridan Blvd at 60th Ave Average Daily Traffic values as reported by the City ofWestminster.At a 25mph detour speed; Travel time on the detour will take approximately 3.3minutes however, there will be traffic backing up and vehicle drivers will notknow exactly what detour to take. Therefore, the total detour time is assumed tobe 20 minutes.* The total Average Daily Traffic and Peak Hour traffic are that reported byAdams County from a traffic count that was done on June 4th 2008.At a 25mph detour speed; Travel time on the detour will take approximately4.8 minutes however, there will be traffic backing up and vehicle drivers willnot know exactly what detour to take. Therefore, the total detour time isassumed to be 20 minutes.* The total Average Daily Traffic and Peak Hour traffic are that reported byAdams County from a traffic count that was done on June 4th 2008.** The total Peak Hour traffic is assumed to be 10% of the Average Daily Trafficreported by the City of Westminster.Loss of Function Time Loss of Function Time Loss of Function TimeThe loss of function time is the amount of time the road is overtopped plus 2-hoursto removed debris from the roadway and secure safe passage for vehicle traffic.The loss of function time is the amount of time the road is overtopped plus 2-hours to removed debris from the roadway and secure safe passage for vehicletraffic.The loss of function time is the amount of time the road is overtopped plus 2-hours to removed debris from the roadway and secure safe passage forvehicle traffic.Storm EventLoss of FunctionTime Storm EventLoss of FunctionTime Storm EventLoss of FunctionTime2-Year 0.00 Hours 2-Year 0.00 Hours 2-Year 4.50 Hours5-Year 0.00 Hours 5-Year 0.00 Hours 5-Year 4.50 Hours10-Year 2.50 Hours 10-Year 0.00 Hours 10-Year 4.50 Hours25-Year 2.75 Hours 25-Year 0.00 Hours 25-Year 4.50 Hours50-Year 2.83 Hours 50-Year 3.50 Hours 50-Year 4.50 Hours100-Year 3.00 Hours 100-Year 4.00 Hours 100-Year 4.50 Hours
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MAJOR DRAINAGEWAY PLANNINGUPDATE FO
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PHASE A - ALTERNATIVES ANALYSIS REP
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P I E R C E S TW A D S W O R T H B
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CP I E R C E S TW A D S W O R T H B
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184812P I E R C E S TW A D S W O R
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Figure 3-3 Hidden Lake Peak Dischar
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450400350Sheriden Blvd.North of Rai
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48121830X1948W 76TH AV2724818242415
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W 72ND AV273324W 70TH AV722760W 69T
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LegendHEC-RAS CenterlineMajor Basin
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483618483624W 64TH AV24TENNYSON ST3
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18HiddenLakeWADSWORTH BD1830X1953LA
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1230TENNYSON ST9624SHERIDAN BDWOLFF
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PHASE A - ALTERNATIVES ANALYSISMajo
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48121830X1948W 76TH AV2724218182424
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LegendHEC-RAS CenterlineMajor Basin
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18HiddenLake18WADSWORTH BD1830X1953
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APPENDIX AMeeting MinutesPHASE A -
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APPENDIX BHydrologic AnalysisPHASE
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Page 77 and 78: Identification#ElementTypeLocationP
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Page 89 and 90: APPENDIX CHydraulic AnalysisPHASE A
Page 91 and 92: Table C-1 HEC-RAS Summary TablePHAS
Page 105 and 106: Jim Baker Reservoir SpillwayPHASE A
Page 107: APPENDIX DLegal OpinionPHASE A - AL
Page 113 and 114: APPENDIX EEnvironmental InventoryPH
Page 115 and 116: APPENDIX FDamage AnalysisPHASE A -
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