Duncan creek

The Federal Highway Administration (FHWA) awarded the Washington State Department of Transportation a Formula Grant of $613,000 on June 12, 2025, under the Highway Planning and Construction program (CFDA 20.205) to execute infrastructure improvements at Duncan Creek in Washington. The project involves replacing an existing stream pipeline system under Colchester Drive with a 3-sided bottomless box culvert, including approximately 40 feet of new channel construction, replacement of the existing stormwater pipe system and outfall infrastructure, and installation of large woody material and riparian plantings to restore ecological function.

This award supports critical transportation and environmental infrastructure modernization efforts consistent with the FHWA's mandate to assist states in highway preservation and improvement. The culvert replacement project addresses both stormwater management and aquatic habitat enhancement objectives, reflecting the program's eligibility for fish passage and culvert restoration activities. As a formula-funded allocation under the Federal-aid Highway Program, this award was administered through the state's established transportation planning processes and is subject to FHWA oversight and applicable environmental compliance requirements under the National Environmental Policy Act.

Project description

Replace existing stream pipeline system under colchester DR with a 3-sided bottomless box culvert. Includes approx. 40-FT of new channel, replace existing stormwater pipe system and outfall, and install large woody material and riparian plantings.