October. 10, 2012
LAS VEGAS – The Nevada Department of Transportation is proud to announce that the West Mesquite Interchange Design-Build Project received the project of the year award in the under $20 million category from the Nevada chapter of the American Public Works Association at its fall conference in Lake Tahoe, Sept. 26-28.
The project marked NDOT’s inaugural use of accelerated bridge construction technology (ABC), which provides for faster, less disruptive project delivery. New I-15 bridges were built on temporary foundations adjacent to the current bridges. Existing bridges were then demolished and the new bridges slid into place using hydraulic jacks, Teflon rails and liquid dish soap.
In addition to NDOT, other key players in the project included the Regional Transportation Commission, the City of Mesquite and the Design-Build team of W.W. Clyde and Horrocks Engineers. To celebrate this innovative project, NDOT and the Design-Build team held a public viewing of Nevada’s first-ever bridge slide on Jan. 10, 2012 in Mesquite.
Projects nominated for APWA awards are evaluated on the basis of service to the public, community need, intricacy of design, aesthetic consideration, difficulty of construction, cost growth and time growth and complexity of financing. The ABC method shaved six months off the construction schedule and saved taxpayers $12.7 million in fuel and travel costs.
Along with reconstructed bridges, the project included reconfiguring I-15 interchange 120 in West Mesquite into a roundabout interchange, widening Falcon Ridge Parkway to boost access, safety and traffic flows and improving on-ramps and off-ramps. The Nevada APWA award is the second award for the West Mesquite Interchange Design-Build Project.
The West Mesquite Interchange Design-Build Project was also named project of the year by the Intermountain Section (Idaho, Montana, Nevada, Utah) for the Institute of Transportation Engineers, and has been featured nationally in stories published in Aspire – The Concrete Bridges magazine, as well as Roads and Bridges magazine and the Civil Engineering magazine.
Project photos are available at West Mesquite Interchange Bridge Slide Pictures. YouTube video of the bridge slide is available at West Mesquite Interchange Bridge Slide Video.
Project: Quick Facts
Traditional bridge construction typically lasts 18 months.That method would’ve closed Falcon Ridge, prompting the creation of a detour route that would’ve increase commutes by 2.5 miles and five minutesper day. Using the ABC method shaved six months off of the construction schedule—the project was completed in a year—and provided the following economic impacts:
$12.7 million – Savings to I-15 commuters and residents.
$3.5 million – Tax savings achieved through the ABC method; a typical bridge costs $18 million to build.
$354,500 – Impact on Mesquite’s economy from workers employed on site during construction.
In design-build projects, final phases of construction are often designed at the same time as earlier phases are built, reducing both project length and cost. In addition, both design and construction are contracted with a single contractor, minimizing project risk and offering greater project innovation and collaboration. In March, NDOT was named “Transportation Owner of the Year” in the southwestern United States by Engineering News-Record/Southwest magazine for the I-15 South Design-Build, West Mesquite Interchange Design-Build, I-80 Design-Build and the I-15 North Design-Build projects.
Established in 1917, the Nevada Department of Transportation is responsible for the planning, construction, operation and maintenance of 5,400 miles of highway and more than 1,000 bridges comprising the state highway system. NDOT’s mission is to provide a better transportation system for Nevada through unified and dedicated efforts. The department is divided into three districts. The districts are responsible for supervising all state transportation activities within their local areas. NDOT’s headquarters is located in Carson City; its district offices are in Las Vegas, Reno and Elko. NDOT is overseen by a seven-member directors’ board and run by senior staff. Visit NDOT's Website for more information.
NDOT strives to provide current information about construction schedules and highway and roadway restrictions and closures. Unscheduled restrictions and closures may occur and weather can impact work schedules. For the latest information on Nevada highway conditions, call 5-1-1 or log on to Nevada 5-1-1/NV Roads. For information about NDOT projects, log on to Current Projects and Programs. You can also follow the department on Facebook, on Twitter and on YouTube.