Sound Transit, Seattle, WA, is extending the U-Link subway from its LRT station at Pine Street to a new station planned at Capitol Hill. Michael Diponio, vice president of Michigan-based Jay Dee Contractors, is the project manager for the Jay Dee/Coluccio/Michels joint venture, which will mine the two tunnels, each measuring 21 ft. in diameter and 3,800 ft. long. Tunneling like this is Jay Dee's stock-in-trade, and the family-owned business has been doing it for more than 45 years. With the U-Link project, however, Diponio faced unique challenges posed by the environmental standards of Washington State and the City of Seattle.
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机译：华盛顿州西雅图市的Sound Transit正在将U-Link地铁从其在Pine Street的LRT站延伸到计划在国会山的新站。总部位于密歇根州的Jay Dee Contractors的副总裁Michael Diponio是Jay Dee / Coluccio / Michels合资企业的项目经理，该合资企业将开采两条直径为21英尺，长3800英尺的隧道。像这样的隧道运输是杰伊·迪伊（Jay Dee）的股票交易，家族企业已经这样做了45多年。但是，通过U-Link项目，Diponio面临着华盛顿州和西雅图市的环境标准所带来的独特挑战。
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