US 2 - Wenatchee River Bridge - Complete October 2014

The bridge construction was complete in November 2013 and removal of the old Green Bridge at the top of Tumwater Canyon was accomplished in October of 2014.

This project, under the name US 2 – Tumwater Canyon Bridge Replacements, included two other bridges: The Chiwaukum Creek Bridge, located 3/4 of a mile to the west and the Drury Creek Bridge, two miles to the east. The project also included an Additional Turn Lanes project at the Tumwater Campground.

This Catastrophic Reduction Structure Preservation project replaced an old bridge on US 2 at the top of Tumwater Canyon, nine miles west of Leavenworth in Chelan County, as well as a smaller one over Drury Creek, two miles further east.


Why is WSDOT replacing bridges in Tumwater Canyon?
The "Green Bridge" over the Wenatchee River at the top of the canyon was a 263 foot long steel truss/concrete girder structure rated structurally deficient and functionally obsolete. That means it failed to meet current design standards for things such as lane widths, shoulders and sidewalks.  Originally built as a railroad bridge in 1900, it was moved to this location in 1936 and converted to a highway bridge.  The age and structure type didn't allow for widening and it had to be replaced.
The 22 foot long,Drury Canyon Creek Bridge, about 2 miles east on US 2, was built in 1937 and was also replaced as part of this project due to the affect of years of "scour" on the bridge footings. That bridge was retrofitted by removing the existing deck and setting a new box culvert between the abutment walls. The new structure will requires no footings in the creek. The new deck has 12 foot lanes and 8 foot shoulders instead of 2. 

The End Result
The Green Bridge's replacement included two 12-foot lanes with an eight foot westbound shoulder and ten foot eastbound shoulder. The old bridge had two 12-foot lanes and no shoulders.  The new structure also spans a greater distance across the Wenatchee River with fewer footings, improving river flow and reducing the need to clear debris (logs jams, etc.) after high water events.

Project Benefits

  • Very little traffic impact during construction as the current bridge remained in use while the new bridge was built alongside.
  • Provides wider shoulders on the bridge deck so vehicles can pull over. 
  • Oversize loads are better accommodated with a wider bridge and elimination of an overhead superstructure. 
  • Provides an eight foot westbound shoulder and ten foot eastbound shoulders better accommodating bicycles and pedestrians.
  • The new bridge accumulates less debris on the footings by increasing the span length across the river.  
  • The new concrete girder structure also eliminates the need to regularly repaint the bridge.


What is the project timeline?

  • Construction started August 1, 2011 and was planned to take 275 working days to complete in the November of 2013. Demolition of the old bridge was complete in October 2014.


2005 Gas Tax (TPA): $539,000
Pre-Existing Funds (PEF): $8,054,000
Total: $8,593,000


How can I get more information?

Josh Patrick, Project Engineer
WSDOT North Central Region
2830 Euclid
Wenatchee, WA 98801
Phone:  (509) 667-2880 or toll free (888) 461-8816