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West Transmission pipeline progresses; Dean Sullivan closure expected for days, contractor reports tunneling setback from flooding
Summary
City engineer reported steady pipe installation on both segments of the West Transmission project, trenching methods, and a bore pit flooded during recent storms that damaged tunnel-boring machine electronics; planned short-term closures including Dean Sullivan are expected to last a few days.
Corey Grama, utilities engineer, updated the Water & Sewer Committee on April 8 on the West Transmission pipeline project, reporting steady progress on both construction segments and describing methods crews are using to lay and protect 50-foot pipe sections.
Grama described use of large trench boxes on straight alignments and smaller trench boxes in topographic or curving areas. He said more than 60% of the pipe is on-site and roughly 3,000 feet of segment 1 and 2,400 feet of segment 2 have been installed (each representing about 8% of its alignment).…
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