September 2011, Vol. 238 No. 9


HDD Solves Crude Line Replacement Across St. Clair River

Enbridge sprang into action after confirming a minor anomaly on its 30-inch Line 6B crude oil pipeline where it crosses under the St. Clair River spanning from Marysville, MI to St. Clair Township, Ontario. After lowering the operating pressure and completing a comprehensive engineering evaluation, Enbridge submitted a written technical and engineering assessment report to United States pipeline safety regulators in September 2010. In a Corrective Action Order issued by the Pipeline and Hazardous Materials Safety Administration (PHMSA) on September 17, 2010, Enbridge was to “…include project plans and a schedule for total replacement of the pipe in the entire St. Cla

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