I-5 - Chehalis River Basin Flood Reduction

Quarterly Project Report Update for Quarter Ending March 2005

Project Title & Location
I-5/Chehalis River Flood Control

Project Description
This project is a partnership with Lewis County to reduce flood impacts to I-5 and the Chehalis River Basin.

Contractor/Consultant
Project not yet advertised or awarded.

Recent Progress

WSDOT and Lewis County are working with the US Army Corps of Engineers (USACE) to develop a Project Management Plan and a Design Agreement for this project. The USACE has limited funds available to prepare these documents. However, when these documents are completed, the project will be able to recover costs from the USACE as funds become available.  The Scope of Work for project consultant, Pacific International Engineering (PIE), is being reduced, and WSDOT is coordinating with Lewis County on amending the consultant agreement. 

PIE is continuing to research a low level by-pass at the Skookumchuck River Dam, but the new owner of the dam, Trans Alta, is not allowing PIE to access it. This situation is currently being reviewed by Lewis County and WSDOT.  PIE is also working on designing  the levees along Airport Road, Salzer Creek and the Skookumcuck River.  WSDOT is requesting 100 year flood elevations along teh Airport Road levee location and at the Mellen Street interchange from Lewis County and PIE. This may be the first levee segment constructed.

Design Construction Impacts

The USACE has indicated that, as a stand-alone project, the proposed dam modifications project would likely have no benefits for I-5, either in cost savings or reduced traffic delay.  Further hydraulic modeling has been requested.  Without direct benefits to the highway system WSDOT will not be able to contribute any "Nickel" gas tax money to this portion of the flood control project.

Environmental Impacts / Compliance

The Chiefs report was signed on Sept. 27, 2004

The Lewis County / PIE River Mile 66 Habitat Enhancement Project  has encountered significant resistance from the Chehalis Tribe and as such the RM 66 project may be cancelled. The USACE has stated they oppose this component and they did not include it in the GRR or FEIS.

Impacts to Traffic

None at this time.

Project Milestones Scheduled Attained Milestone Outlook
Design Start December 2003 December 2003 Began on time.
Record of Decision March 2006  
Right of Way Complete December 2006  
Ad Date January 2007

 

Project Cost Summary: Dollars in
millions
Percent
of Total

Planned vs. Actual Expenditures
(Total Project Cost)
Project Expenditure Chart

Preliminary Engineering $4.0 13.3%
Right-of-Way $6.0 20%
Construction $20.0 66.7%
Funded Project Costs $30.0 100%

Nickel funds included in above costs

$30.0 100%

2005 Transportation Partnership Account

  For more information, go to www.wsdot.wa.gov/projects

Rich Hensley, WSDOT Area Engineer, at (360) 740-8600, or e-mail: henslerg@wsdot.wa.gov.