SR 20 - Mazama Area - Fish Barrier

View entire map This project removed a barrier to migrating fish in Okanogan County where Little Boulder Creek passes under SR 20 at mile post 181.35, about two miles east of Mazama. View entire photo Little Boulder Creek outlet. Project Facts • Goat Creek Road was used as a detour during construction. • Construction began September 6th and work was completed on Monday, October 24th. • Estimated construction time was 6 weeks (30 working days).

Project was complete October 24, 2005

This Environmental Retrofit Project addressed Fish Barriers under SR 20.

Why did WSDOT Replace the existing culvert?
The undercrossing of Little Boulder Creek was identified as deficient for fish passage by the Washington State Department of Wildlife. 

The End Result
The 6-foot by 9-foot, steel structural plate arch was replaced with a 26-foot bottomless steel pipe arch allowing fish passage in a more natural environment.

Project Benefits

• Improved fish migration
• Increased culvert capacity to accomodate 100 year flood flows.
• reduced maintenance

What was the project timeline?
Construction began September 6th,2005 and was  complete Monday, October 24th.

Public Involvement
Your thoughts and opinions are important to us. If you have any questions or concerns about this project please contact the Project Office.

Environmental Protection

All environmental laws and guidelines were strictly followed.  The following are the permits and/or documentation required for this project:

• Environmental Project Documents:
  NEPA - Documented CE
  SEPA - Determination of Non-Significance
  
• Environmental Project Permits:
  Army Corps of Engineers
  Hydraulic Project Approval
  Nat. Historic PreservationAct - Section 106
  Water Quality Certification - Sec. 401

Increasing safety is a priority
Safety for the public and the construction workers is paramount while the work is underway.  A comprehensive traffic control plan and a work zone safety plan was in place to protect travelers and workers.

Did this project impact tribal resources?

No impacts to tribal resources were identified.  WSDOT addresses the concerns of the tribal nations using the process outlined in Section 106 of the National Historic Preservation Act and the WSDOT Tribal Consultation Policy adopted in 2003 by the Transportation Commission as part of the WSDOT Centennial Accord Plan.

Financial Information

This project was advertised for bids on April 18th and eight bids were opened on May 12th.  Snelson Companies Inc. was awarded contract #6979 on May 16th for $409,435.00, 11% under the engineering estimate.

This project was funded through the following sources:

• Pre-Existing Gas Tax - $545,000
• Total funding from all sources - $545,000

How can I get more information?
Contact:

Mike Fleming, Project Engineer
WSDOT North Central Region Project Office
PO Box 98
Wenatchee, WA 98807
Phone:  509-667-2870 or toll-free 1-800-461-8816
Email:  FleminM@wsdot.wa.gov

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