Region: West

One of the first major dams in the Pacific Northwest, the Cushman Hydroelectric Project, created two dams on the North Fork of the Skokomish River in the 1920s to provide power to the surrounding area. As part of a Federal Energy Regulatory Commission (FERC) relicensing term and a settlement agreement for the use of the […]

The Kentch Reach on the South Fork Walla Walla River has been subject to large-scale human disturbance for more than 100 years. Timber and agricultural uses involved straightening the river channel and isolating the river from its historic floodplain. The result was a fast-moving conduit that was virtually devoid of native fish spawning and rearing […]

When a tank trailer spilled approximately 2,800 gallons of gasoline into a drainage ditch along a remote stretch of State Highway 21 (SR-21) on the Colville Indian Reservation in northeastern Washington, the gasoline quickly reached groundwater and threatened to migrate to the Sanpoil River on the opposite side of the highway. Our project client Able […]

Before this project was completed, Meeker Creek flowed through a straight man-made ditch in a suburban neighborhood of Puyallup, Washington. The artificial nature of the creek caused problems for residents and wildlife alike. Poor water quality and a lack of spawning and off-channel habitat meant very low salmon populations, and the creek often flooded during […]

The Washington State Department of Transportation (WSDOT) needed to make critical improvements to the SR 520 Floating Bridge across Lake Washington, a major four-lane artery connecting Seattle to Bellevue and suburbs to the east. Evaluations showed the bridge, in service since 1963, to be in poor condition, and a significant seismic risk in the event […]

Pier 54 is a turn-of-the-century pier in Seattle, Washington, along the Puget Sound waterfront, home to Ivar’s, a waterfront seafood restaurant. Concerns about the stability of the 100-year-old wooden pier, especially in the event of an earthquake, motivated Ivar’s to begin a series of significant seismic upgrades to the structure. As a member of the […]

The Yelm Hydroelectric Project provides reliable clean energy to the City of Centralia, Washington. A run-of-the-river concrete ogee dam diverts water from the Nisqually River into a nine-mile canal before it falls 200 feet into the powerhouse. In 1996, flooding in the Nisqually River washed out the canal’s earth-fill embankments, originally built in the late […]

The Palermo Wellfield is an underground source of drinking water for the City of Tumwater, Washington. The wellfield is situated near a residential neighborhood at the foot of a steep hillside, below a number of current and former commercial sites containing potentially dangerous contamination by chlorinated solvents. This contamination poses a risk to the Palermo […]

The 1918 Eighth Avenue building in downtown Seattle is a 34-story mixed-use office/retail tower with below-grade parking. The site is bounded on two sides by major downtown streets and on two sides by condominium and office structures. As a result, excavation—which ranged from 63 to 73 feet deep—had complex support needs. GeoEngineers worked with Ground […]

Located in Spokane’s thriving University District, the property formerly known as Taylor Edwards lies along the Spokane River and is a prime commercial development site. BNSF Railway Company formerly owned the property and the historic Great Northern Building located there. The site had once been used for railcar repair and had also been leased for foundry […]