Valley Metro Light Rail Northwest Extension
Phoenix
Best Project
Owner/DeveloperValley Metro Rail
General ContractorSUNDT/Stacy和Witbeck合资企业
领先设计公司AECOM
Subcontractors动作障碍；鸟布莱斯沥青铣削；C＆S清扫；cemex;corrpro;CPC建设；Dougherty绘画；hdr;金布雷尔电气； M&P Contracting; Mass Electric Construction; Nesbitt Contracting; SmithCraft; Stantec; Sunnyside Masonry; The Fishel Co.; ViaSun Corp.
A 3.2-mile addition to the Phoenix metropolitan area’s Valley Metro Rail system, the Northwest extension was constructed along 19th Avenue from Montebello to Dunlap avenues, a section of roadway with high traffic counts and more than 300 property owners.
This extension included constructing the traction power substations off site—a first for the rail system. Pre-manufacturing the substations allowed the team to enter the field testing five months earlier than with a site-built TPSS, according to the project team.
“This was a huge time saver, as the amount of onsite testing was drastically reduced and any major troubleshooting was completed in a factory setting prior to the units arriving on site,” says Chris Elison, an engineer with the Sundt and Stacy and Witbeck joint venture.
The $75.1-million project included roadway widening, installation of embedded double track for the entire alignment, train substations, traffic signals and a park-and-ride lot at Dunlap Avenue.
The project also included curb-to-curb replacement of utility infrastructure, including more than 50 miles of water, sewer, storm, gas, electric and communications utilities. The utility phase was completed three months ahead of schedule, which the project team credits for laying the groundwork for overall completion before deadline. Of particular concern to the construction team was a 60-year-old, 36-in. city of Phoenix water line that had to be moved 8 to 12 ft, depending on its proximity to eventual trackway.
埃里森说：“这座城市非常担心这场平局是在夏季炎热之前完成的，当时关闭是不可行的，并且会对项目时间表产生巨大的负面影响。”
Communicating with the community about roadway restrictions and service interruptions was done through a weekly email blast and the development of a mobile app.
