Market Experience
Devil's Slide Tunnel – Pacifica, CA
Due to the long history of rockslides and land slippage, Kiewit Pacific Co. is constructing twin tunnels to bypass the Devil’s Slide portion of Route 1, so motorists can avoid these major slide areas. Using the New Austrian Tunneling Method, which relies on inherent rock strength for support, crews will construct the tunnels through granitic, sandstone and shale formations. The tunnels will be about 4,100 feet long, 30 feet wide, 22 feet high and 60 feet apart.
East Side CSO – Portland, OR
When completed in December 2011, this massive tunnel construction program will virtually eliminate combined sewer overflows into the Willamette River. A Kiewit-led joint venture completed preconstruction services under Phase I of the project. Currently, Kiewit is performing work on Phase II, the largest component of Portland's CSO program, a $381 million network of shallow pipelines.
Chattahoochee Tunnel – Cobb County, GA
As the largest project ever awarded by the Georgia Water & Sewer Authority of Cobb County, the $114 million Chattahoochee Tunnel, located just northwest of Atlanta, will supplement the current sewage system. The scope of work includes excavating a 49,600-ft.-long tunnel 100- to 350-ft deep, excavating two construction shafts and a pump station, and constructing four intake structures.
Tren Urbano - Rio Piedras Section – San Juan, Puerto Rico
The $250+ million Tren Urbano-Rio Piedras design-build project involved the construction of a one-mi.-long tunnel and two subway stations. Kiewit used three different soft ground tunneling methods to address the wide variety of ground conditions.