The US 101, Jefferson and Clallam counties – Remove Fish Barriers project is part of Washington state’s broader initiative to eliminate barriers restricting salmon migration, reconnecting aquatic habitats and improving long-term ecological health.

As part of Washington State Department of Transportation’s (WSDOT) fish passage program, Atlas is providing environmental and quality assurance services to support the replacement of six fish barriers along US 101 — especially critical for Clallam and Jefferson counties, as they’re located on the northwestern side of the state on the Olympic Peninsula. The project involves constructing five single-span bridges and a buried box culvert to restore natural stream conditions, allowing fish to access historic breeding and rearing habitats.

Atlas is helping WSDOT manage National Environmental Policy Act documentation, Section 404 and 401 permit applications, and environmental compliance measures, aligning project objectives with state and federal regulations.

The Atlas team is working with WSDOT, the Washington Department of Fish and Wildlife and the Jamestown S’Klallam Tribe to integrate permitting strategies with construction schedules so work remains on track while protecting sensitive ecosystems.

In addition to permitting support, Atlas provides fish exclusion, arborist/tree inventory, wetland verification and delineation, and environmental compliance inspections for stormwater management to safeguard sensitive habitats throughout the project.

The team also performs quality assurance and materials testing, overseeing compliance throughout construction so the new structures meet environmental and engineering standards. Fish already are returning to previously blocked streams, demonstrating the benefits of these efforts.

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The reconstruction of the I-86/I-15 system interchange in Pocatello, Idaho, is a monumental infrastructure project aimed at significantly improving connectivity and traffic flow. Managed by Tim Morgan, this project began in June 2022 and is expected to continue into 2025.

Atlas is providing inspection and leading all materials sampling and testing for the Idaho Transportation Department (ITD). This complex project involves substantial quantities of engineered fill and sub-base, alongside the construction of eight interstate bridges. Some staggering figures from the project include 4,374,794 pounds of steel bridge components, equating to nearly three miles of individual steel plate girders, and 4,408 linear feet of prestressed concrete girders.

The project demands 9,179 feet of steel pile, 286,888 cubic yards of granular borrow, 898,164 cubic yards of excavation, 227,888 tons of ¾” aggregate base, and 109,531 tons of hot mix asphalt (HMA).

Through meticulous planning and execution, Atlas ensures all quality assurance testing is completed to meet the minimum testing requirements of ITD. This project not only represents a significant improvement in regional infrastructure but also underscores Atlas’ commitment to excellence in engineering and construction.

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Spanning 6.44 miles, the project includes the design and construction of the new Harbor Bridge and the reconstruction of key segments of US 181, I-37 and Crosstown Expressway. The six-lane bridge features three lanes in each direction, full shoulders, a center median barrier and a 10-foot-wide shared-use path for pedestrians and cyclists. Complementary features include LED lighting, a public plaza, and xeriscape landscaping that reflect the region’s identity and climate.

As the project’s Independent Quality Firm (IQF), Atlas played a central role in upholding quality standards throughout the design-build delivery process. Our team provided third-party oversight for 17 component types sourced from more than 15 fabrication sites across the U.S. and internationally. Atlas developed custom Inspection and Testing Plans (ITPs) to support traceability, ensure alignment with TxDOT specifications and enable seamless integration during construction.

With the new bridge open and final phase preparations underway, Atlas continues to support the project through ongoing inspection services as demolition of the original truss bridge nears and adjacent roadway reconstruction begins.

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