Tetra Tech INCA provided support to the Washington Department of Transportation (WSDOT) design team in order to help keep the project design on track to meet the planned construction start date in late 2006. The services requested were the development of a construction staging strategy, construction staging plans, Clean Water Act Section 404(b)1 analysis reevaluation and all water related permit exhibits to the WSDOT project design team for a major 5-mile long highway widening project in Skagit County, Washington.

Key project elements included:

• Construction staging strategy technical memorandum, draft and final versions;
• Construction staging plans for inclusion in the final plan set;
• Section 404 (b)1 analysis reevaluation; and
• Joint Aquatic Resource Permit Application (JARPA) permit exhibits, draft and final versions.

  SR 20: Fredonia to I-5 Widening (97.37 kB)

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