August 2018, Vol. 245, No. 8
Projects
Projects
Tunnel, Trench Offer Options for Replacing Pipeline A 65-year-old pipeline that carries crude oil beneath a waterway connecting two of the Great Lakes could be replaced with pipes buried in a tunnel or partially enclosed in trenches that would pose virtually no risk of leakage but require years and hundreds of millions of dollars to build, according to a report. Enbridge, the Canadian company whose Line 5 runs 645 miles (1,038 km) between Superior, Wisc., and Sarnia, Ont., produced the analysis of possible alternatives for replacing the 4.5-mile-long (7-km-long) segment at the bottom of the Straits of Mackinac between Lakes Huron and Michigan. The study was required under an agreeme

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