Contractors Deliver Relief in Phoenix With Tunnel Project

SSC Underground kicked off the tunneling project with a 105-ft. installation of 66-in. casing for a 48-in. waterline. The second segment included the installation of six 86-in. diameter tunnels for a total of 834 ft.

By Chuck MacDonald CEG CORRESPONDENT

National and local news have been covering the water crisis in America’s Southwest and its dependence on the dwindling resources from the Colorado River. Recent infrastructure projects in northwest Phoenix are helping to address that issue in this area of approximately 400,000 people.

The city of Phoenix recently embarked on a project that would provide an underground pipeline to supply a backup water supply from the Salt and Verde Rivers. Phoenix’s drought pipeline project included 12 mi. of new pipeline and four booster pumping stations.

SSC Underground provided the tunneling portion of the job, working with lead contractors Sundt Construction, which constructed six tunnels over 4 mi.; PCL, which constructed three tunnels in a water treatment plant; and Kiewit, which constructed one tunnel in a single location.

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