Whittier Access Project, Alaska The Anton Anderson Memorial Tunnel Whittier Access Project.
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Transcript of Whittier Access Project, Alaska The Anton Anderson Memorial Tunnel Whittier Access Project.
Whittier Access Project, Alaska
The Anton Anderson Memorial Tunnel
Whittier Access Project
Whittier Access Project, Alaska
Outline
Project Background Project Issues Design and Implementation Cost-Benefit Analysis Results Critique
Whittier Access Project, Alaska
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
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
Groups Involved
Alaska Department of Transportation and Public Facilities
Design Builder: Kiewit Construction Lead Consultant: HDR Designer: Hatch Mott MacDonald
Whittier Access Project, Alaska
Project Objectives
Increase access to Whittier Guarantee convenient and
affordable access Improve the safety
measures of the tunnel
Whittier Access Project, Alaska
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
Risks and Uncertainties
Weather Design-Build construction method Availability of materials & equipment
Whittier Access Project, Alaska
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
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
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
Cash Flow Diagram
Anton Anderson Project: Cash Flow Diagram
$(300,000.00)
$(200,000.00)
$(100,000.00)
$-
$100,000.00
$200,000.00
$300,000.00
$400,000.00
Time
Do
llars
Whittier Access Project, Alaska
Projected Revenue
Projected Annual Revenue
$-
$200,000.00
$400,000.00
$600,000.00
$800,000.00
$1,000,000.00
$1,200,000.00
$1,400,000.00
$1,600,000.00
2001 2002 2003 2004 2005 2006 2007 2008 2009
Year
Re
ve
nu
e [
$]
Whittier Access Project, Alaska
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
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
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
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
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
Questions?