The Anton Anderson Memorial TunnelOutlineWhittier, AlaskaHistoryGroups InvolvedProject ObjectivesAlternativesRisks and UncertaintiesTunnel ConstructionConstruction ChallengesAddressing the ChallengesCash Flow DiagramProjected RevenueCosts and BenefitsResultsPerformanceCritique and ConclusionsReferencesQuestions?Whittier Access Project, AlaskaThe Anton Anderson Memorial TunnelWhittier Access ProjectWhittier Access Project, AlaskaOutlineProject BackgroundProject IssuesDesign and ImplementationCost-Benefit AnalysisResultsCritiqueWhittier Access Project, AlaskaWhittier, AlaskaPopulation: 300 residentsTourist destination for water recreation and vacationingRail port built during WWII to provide a supply link from Prince William Sound to town of PortageWhittier Access Project, AlaskaHistory1943: 2.5 mile RR tunnel constructed through the Maynard Mountain leading to a boom in population growth1950: military vacated Whittier, then became a federally-run commercial portPassage to Whittier only via RR flat cars that carry vehiclesAccess Project: the tunnel, the new roadway, and two bridgesWhittier Access Project, AlaskaGroups InvolvedAlaska Department of Transportation and Public FacilitiesDesign Builder: Kiewit ConstructionLead Consultant: HDRDesigner: Hatch Mott MacDonaldWhittier Access Project, AlaskaProject ObjectivesIncrease access to WhittierGuarantee convenient and affordable accessImprove the safety measures of the tunnelWhittier Access Project, AlaskaAlternativesTo increase the existing rail serviceTo use a high-speed electric trainTo construct a highway route over Maynard MountainTo construct a highway route through the tunnelTo construct a combined roadway and railway route through Maynard Mountain and a highway leading to the tunnelWhittier Access Project, AlaskaRisks and UncertaintiesWeatherDesign-Build construction methodAvailability of materials & equipmentWhittier Access Project, AlaskaTunnel ConstructionThe existing railroad track and underlying crushed rock were replaced with concrete panelsRock excavation created space for fans and safehouses for use during emergenciesWalls are natural rock, reinforced with steel plates where necessaryWhittier Access Project, AlaskaConstruction ChallengesSnowTunnel Portals: had to be built to resist forces of possible avalanchesTight working conditionsTime constraint: project had to be finished in two yearsKeep tunnel in operationWhittier Access Project, AlaskaAddressing the ChallengesStaging areasA-shaped portalsSpecialized equipment and methods, detailed scheduling of machinery sequenceHeavy emphasis on partnering, overlapping shifts to ensure constant on-site monitoringProcedure was practiced outside of tunnel before actual installationWhittier Access Project, AlaskaCash Flow DiagramWhittier Access Project, AlaskaProjected RevenueWhittier Access Project, AlaskaCosts and BenefitsCostsCost of ConstructionLoss of full tunnel operationsEnvironmental impactsBenefitsIncreased accessibility to WhittierShorter commute timeEconomic boostGain exposure to design-buildWhittier Access Project, AlaskaResultsInnovative computerized control and emergency response systems that regulate rail and vehicle traffic Can operate in -40o F temperatures and in extreme wind and snow conditionsFirst tunnel to use both portal and jet fans for ventilationWhittier Access Project, AlaskaPerformance$57 million dollar tunnel, under $59.6 million contract amountEarly finish date: Fully operational two months ahead of schedule, June 2001Only combined railroad/highway tunnel in the worldThe longest highway tunnel in North AmericaWhittier Access Project, AlaskaCritique and ConclusionsDesign-build allows room for innovation in construction methodsCareful planning and monitoring increase overall project efficiencyEnd result: substantial decrease in project duration and costWhittier Access Project, AlaskaReferencesADOT&PF Facility Manager, Mr. Gordon S. Burton http://www.dot.state.ak.us/creg/whittiertunnel/index.htmhttp://www.kiewit.com/project/pro_5598016.htmlhttp://www.auca.org/month/http://transportation.org/aashto/success.nsf/allpages/AlaskaWhittierAccesshttp://www.govwest.com/Whittier_publ.asphttp://www.asce.org/pressroom/news/pr043001_ocea.cfmhttp://www.hdrinc.com/information/default.asp?PageID=1301&ParentID=3L38Whittier Access Project,
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