US Navy Culvert Replacement and Fish Passage Design
GeoEngineers developed the civil design concept and geotechnical details for constructing a 275-foot long, 20-foot diameter tunnel to replace a failing 48-inch diameter culvert under the Shelton-Bangor-Bremerton railroad near Belfair, WA. The railroad, owned by the US Navy and maintained by Puget Sound and Pacific Railroad, is used to transport various goods, supplies, building materials, […]
Ivar’s Pier 54 Seismic Analysis and Renovation
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 […]
SR 520 Floating Bridge Replacement
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 […]
Meeker Creek Channel Restoration
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 […]
Sanpoil Emergency Spill Response
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 […]
Kentch Reach River Restoration
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 […]
Water Rights Permitting for Cushman Hydroelectric Project
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 […]
Replacing Stream Diversions with Wells
The Cascadia Conservation District (CCD) and Trout Unlimited (TU) are working together to decrease instream structures that divert water from the Entiat River and Roaring Creek in Central Washington. These streams provide valuable salmon habitat and the direct diversions reduce streamflow in the lower Entiat basin during the irrigation season to a dangerous level for […]
Remote Dam Monitoring Improves Decision-Making
Portland General Electric (PGE) operates seven hydroelectric facilities throughout Oregon that provide power to more than 1.7 million customers. To maintain its Federal Energy Regulatory Commission (FERC) license, PGE must meet stringent dam-safety requirements, but its existing data-gathering system required more than 200 man-hours to compile, analyze and generate the required annual reports. PGE asked GeoEngineers […]
Environmental Cleanup at Former Gold Processing Site in Nome, Alaska
Nome, Alaska is a coastal town of less than 4,000 people 500 miles northwest of Anchorage that experienced a great boom during the Alaska gold rush in the early 1900s. Placer gold mining continued to be one of the leading economic activities in Nome through the 1960s, with more than 3.6 million ounces of gold […]