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The Anton Anderson Memorial Tunnel

The Anton Anderson Memorial Tunnel. Whittier Access Project. Outline. Project Background Project Issues Design and Implementation Cost-Benefit Analysis Results Critique. Whittier, Alaska. Population: 300 residents Tourist destination for water recreation and vacationing

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The Anton Anderson Memorial Tunnel

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  1. The Anton Anderson Memorial Tunnel Whittier Access Project Whittier Access Project, Alaska

  2. Outline • Project Background • Project Issues • Design and Implementation • Cost-Benefit Analysis • Results • Critique Whittier Access Project, Alaska

  3. Whittier, Alaska • Population: 300 residents • Tourist destination for water recreation and vacationing • Rail port built during WWII to provide a supply link from Prince William Sound to town of Portage Whittier Access Project, Alaska

  4. History • 1943: 2.5 mile RR tunnel constructed through the Maynard Mountain leading to a boom in population growth • 1950: military vacated Whittier, then became a federally-run commercial port • Passage to Whittier only via RR flat cars that carry vehicles • Access Project: the tunnel, the new roadway, and two bridges Whittier Access Project, Alaska

  5. Groups Involved • Alaska Department of Transportation and Public Facilities • Design Builder: Kiewit Construction • Lead Consultant: HDR • Designer: Hatch Mott MacDonald Whittier Access Project, Alaska

  6. Project Objectives • Increase access to Whittier • Guarantee convenient and affordable access • Improve the safety measures of the tunnel Whittier Access Project, Alaska

  7. Alternatives • To increase the existing rail service • To use a high-speed electric train • To construct a highway route over Maynard Mountain • To construct a highway route through the tunnel • To construct a combined roadway and railway route through Maynard Mountain and a highway leading to the tunnel Whittier Access Project, Alaska

  8. Risks and Uncertainties • Weather • Design-Build construction method • Availability of materials & equipment Whittier Access Project, Alaska

  9. Tunnel Construction • The existing railroad track and underlying crushed rock were replaced with concrete panels • Rock excavation created space for fans and safehouses for use during emergencies • Walls are natural rock, reinforced with steel plates where necessary Whittier Access Project, Alaska

  10. Construction Challenges • Snow • Tunnel Portals: had to be built to resist forces of possible avalanches • Tight working conditions • Time constraint: project had to be finished in two years • Keep tunnel in operation Whittier Access Project, Alaska

  11. Addressing the Challenges • Staging areas • A-shaped portals • Specialized equipment and methods, detailed scheduling of machinery sequence • Heavy emphasis on partnering, overlapping shifts to ensure constant on-site monitoring • Procedure was practiced outside of tunnel before actual installation Whittier Access Project, Alaska

  12. Cash Flow Diagram Whittier Access Project, Alaska

  13. Projected Revenue Whittier Access Project, Alaska

  14. Costs and Benefits • Costs • Cost of Construction • Loss of full tunnel operations • Environmental impacts • Benefits • Increased accessibility to Whittier • Shorter commute time • Economic boost • Gain exposure to design-build Whittier Access Project, Alaska

  15. Results • Innovative computerized control and emergency response systems that regulate rail and vehicle traffic • Can operate in -40o F temperatures and in extreme wind and snow conditions • First tunnel to use both portal and jet fans for ventilation Whittier Access Project, Alaska

  16. Performance • $57 million dollar tunnel, under $59.6 million contract amount • Early finish date: Fully operational two months ahead of schedule, June 2001 • Only combined railroad/highway tunnel in the world • The longest highway tunnel in North America Whittier Access Project, Alaska

  17. Critique and Conclusions • Design-build allows room for innovation in construction methods • Careful planning and monitoring increase overall project efficiency • End result: substantial decrease in project duration and cost Whittier Access Project, Alaska

  18. References • ADOT&PF Facility Manager, Mr. Gordon S. Burton • http://www.dot.state.ak.us/creg/whittiertunnel/index.htm • http://www.kiewit.com/project/pro_5598016.html • http://www.auca.org/month/ • http://transportation.org/aashto/success.nsf/allpages/AlaskaWhittierAccess • http://www.govwest.com/Whittier_publ.asp • http://www.asce.org/pressroom/news/pr043001_ocea.cfm • http://www.hdrinc.com/information/default.asp?PageID=1301&ParentID=3L38 Whittier Access Project, Alaska

  19. Questions? Whittier Access Project, Alaska

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