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

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