INTERWEST CONSTRUCTION, INC.

Interwest Construction, Inc. specializes in highway, street, and bridge construction, delivering precision civil infrastructure projects for public transportation systems. Their technical expertise includes earthwork, pavement design and placement, drainage system installation, bridge abutment construction, and right-of-way management, all executed in compliance with state and federal transportation standards. The firm demonstrates a focused capability in phased roadway rehabilitation, particularly in challenging terrain such as mountainous or flood-prone corridors, as evidenced by their work on the Upper Hoh River Road Phase 2 project. Their approach emphasizes safety-critical sequencing, environmental stewardship, and adherence to WSDOT and FHWA specifications, positioning them as a reliable contractor for complex, publicly funded transportation upgrades in the Pacific Northwest. The company maintains a consistent relationship with the Department of Transportation, primarily delivering infrastructure improvements on state highway systems. Their work involves collaborative planning with state DOT engineers, utility coordination, and traffic control management during active construction, indicating a mature understanding of public agency protocols and permitting workflows. Interwest’s engagements suggest a pattern of repeat work on sequential phases of multi-year corridor enhancement programs, reflecting trust in their execution reliability and quality control. Their primary industry focus is on NAICS 237310, where they deliver heavy civil construction services tailored to surface transportation networks. This includes asphalt and concrete paving, retaining wall construction, culvert installation, and signage and marking systems—all critical components of modern roadway infrastructure. They are positioned as a niche contractor serving regional transportation needs, with an emphasis on durability and long-term maintenance efficiency. Interwest Construction, Inc. is a small business structured as a 2L entity, headquartered in Burlington, Washington. While they currently hold no federal certifications, their operational footprint is firmly rooted in Washington State’s transportation infrastructure market, with demonstrated capacity to manage state-funded projects from mobilization through final acceptance.