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Bridge Review Panel
Bridge Review Panel convened to consider bridge type
The Columbia River Crossing Bridge Review Panel was convened in November 2010 by
the Oregon and Washington departments of transportation. The panel was asked to evaluate the open web box girder
bridge type previously under consideration for the Columbia River Crossing
project, as well as the environmental, regulatory and physical constraints
pertinent to the crossing. A
final report was issued February 2011.
Panel recommends three bridge types
The panel’s primary recommendations focused on bridge type.
The panel offered three bridge types for consideration that
panel members believe would have less construction risk and be
potentially less expensive to construct than the previous bridge
type. The three types were deck truss, tied arch and
cable-stayed. The panel did not recommend any of the types over
As a result of the bridge panel’s recommendation, Oregon
Governor Kitzhaber and Washington Governor Gregoire directed the
CRC project to discontinue further design work on the open web
box girder and begin a review of the panel's three options. The
governors said the analysis must consider cost, schedule,
environmental impact, commitments made to communities and
stakeholders in both states, and overall risk. A
report back to the governors that includes a recommended
bridge type, based on the criteria above and consultation with
local partners, was delivered on Feb. 25, 2011.
sessions were held on March 10, 2010 to receive public comment
on the draft recommendations.
Governors select deck truss bridge type
On April 25, 2011, the governors announced the
bridge as the recommended replacement structure for the aging Interstate 5
bridge. In making their recommendation, the governors considered the findings
from the Bridge Review Panel, the results of the Oregon and Washington
transportation departments' review, public comments, input from agency officials
and the purpose and need of the project.
The governors cited several major factors influencing their decision to move
forward with a deck truss bridge:
- Reducing and eliminating risks to schedule and budget.
In all key areas that determine risk - schedule, design, construction,
procurement, cost growth and construction claims - the deck truss performs
better than the cable-stayed bridge type. It also is the least likely to
require a supplemental draft environmental impact statement because its
environmental impacts and footprint closely resemble the previously studied
- Affordability. The deck truss is likely the most
affordable of the three bridge types because it is the least costly, the
most likely to meet schedule, the easiest bridge to build and will attract
the most competitive bids.
- Securing funding. A delay in securing the federal
Record of Decision (ROD) creates significant risks of missing or delaying
federal funding opportunities. CRC is seeking $400 million in federal
highway discretionary funding as well as $850 million in Federal Transit
Administration (FTA) New Starts funding.
Concept of deck truss bridge type chosen for the project. Additional architectural design work is forthcoming.