The 38.1 ft diameter Robbins Main Beam TBM, the largest hard rock TBM ever used on U.S. soil for boring tunnels, doing a great job for the contractor, Southland/Mole JV, at Mill Creek Drainage Relief Tunnel in Dallas, Texas.
Excellent piece to read.
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://tunnelingonline.com/texas-mettle-tbm-and-team-are-making-progress-and-overcoming-challenges-at-mill-creek/
Texas Mettle: TBM and Team are Making Progress and Overcoming Challenges at Mill Creek
tunnelingonline.comThe 11.6 m (38.1 ft) diameter Robbins Main Beam TBM is well on its way at the Mill Creek Drainage Relief Tunnel in Dallas, Texas.