Lane wins $255m contract for water storage tunnel in Washington


Lane Construction, the US subsidiary of Italian construction group Salini Impregilo, has won a $255m contract for a water storage tunnel to reduce polluted overflows into Seattle’s Lake Washington Ship Canal, Washington.

Sewage and stormwater from Seattle, including the Ballard, Fremont, Wallingford and Queen Anne localities is collected and moved in one set of pipes.

The sewage flows to the local wastewater treatment plant during the dry weather conditions. However, during wet weather conditions, polluted runoff can exceed the capacity of the pipes, resulting in a mixture of stormwater (90%) and sewage (10%) outfalls flowing into the nearest water body.

Known as combined sewer overflow (CSO), the untreated water contains contaminants that can make people sick, and harm marine life, wildlife and the environment.

The Ship Canal Water Quality Project – Storage Tunnel project involving a 2.7-mile tunnel will keep more than 75m gallons of polluted stormwater and sewage out of the canal, Salmon Bay and Lake Union on average every year.

Construction is expected to begin in December 2019 and be completed in 2023.

Lane, along with Salini Impregilo, is also working on other CSO projects, including the Northeast Boundary Tunnel (NEBT) in Washington, D.C., valued at $580m; the Dugway Storage Tunnel in Cleveland, Ohio, valued at $153m; and the Three Rivers Protection & Overflow Reduction Tunnel (3RPORT) in Fort Wayne, Indiana, valued at $188m.

Lane also provides services in other sectors such as highways, bridges, rail, metro and mass transit.

The company’s main projects include the I-10 Corridor Express Lanes in California; Unionport Bridge in Bronx, New York; and the Purple Line Light Rail Extension in Maryland.

In September 2019, Texas Central, the developer of the Texas Bullet Train, has signed a design-build contract with the joint venture of civil engineering contractor Salini Impregilo and Lane Construction for the high-speed train project.

Based on Central Japan Railway’s Tokaido Shinkansen train system, the Texas train project is estimated to cost approximately $20bn with the civil works estimated at $14bn.

Image: Lane Construction wins $255m contract for water storage tunnel in Washington. Photo: Courtesy of MalinB49 from Pixabay.

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