Project Portfolio

Explore our extensive portfolio of completed projects.

Sunrise Powerlink Geotechnical

San Diego Gas and Electric (SDG&E) proposed a new 117-mile, high-voltage transmission line that will have a 1,000 megawatt capacity to transport renewable energy from...

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US 89 Landslide

On February 20, 2013, a landslide occurred on U.S. 89 near Page, Arizona. More than 150 feet of roadway buckled causing the indefinite closure of...

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Going to the Sun Road Rehabilitation

The Going-to-the-Sun Road in Glacier National Park was built in 1932, and is a narrow 52-mile paved highway. The National Park Service and Federal...

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Denali National Park Landslide Mitigation

The National Park Service required landslide mitigation along the primary access road within Denali National Park. The project sites were located along steep...

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Devil’s Slide Twin Tunnels

The Devil's Slide project consisted of constructing twin tube tunnels beneath San Pedro Mountain in San Mateo County, California. When completed, the 30-foot wide, 650-foot...

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Hoover Dam Bypass

The Hoover Dam Bypass Project was conceived to address a number of issues related to the functionality of US 93 and its crossing of the...

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Juneau Access Road

A road to provide access between Juneau and the continental road system has been proposed for decades. The only alternative to air transportation to and...

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US 60, Silver King and Superior Streets

The Federal Highway Administration and Arizona Department of Transportation (ADOT) commissioned a study to evaluate the improvement and/or realignment of US Highway 60 from outside...

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Lake Mead Intake No. 3

Southern Nevada Water Authority (SNWA) investigated the construction of a large diameter water-supply tunnel from their existing water treatment plant into Lake Mead’s Boulder Basin....

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