The Michigan Department of Environmental Quality (MDEQ) Water Resources Division has issued Enbridge Energy Partners, L.P. a permit to install 22 anchor support structures into the lake bed on Line 5 pipelines to decrease the span distance at these locations within the Straits of Mackinac.
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The MDEQ completed its review and drafted the permit on 2 March 2018, under authority of Part 325, Great Lakes Submerged Lands, of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended.
Project activities will involve the installation of a helical anchoring system with saddle mounts around the pipeline in each of the proposed locations. The 22 anchors will be augured directly into the lake bed using 10 in. diameter screws (total of 44 screws). The total lake bottom impact will be approximately nine cubic yards. Permit conditions require verification of anchor placement and documentation of pipeline coating conditions, and addressing damaged coating where discovered.
The project is located in T39N, R4W, Sections 10, 11, Wawatam Township, Emmet County and T40N, R4W, Section 25, Moran Township, Mackinac County, Michigan.
All 22 proposed anchors to be installed are to minimise the potential of having any spans exceed 75 ft. This work is being completed to fulfill Enbridge’s obligations under the bottomlands easement with the State of Michigan, as well as the Enbridge-US Environmental Protection Agency Federal Consent Decree Implementation. This project is not associated with any new utility installation.
The anchor permit decision is in addition to the ongoing implementation of the 27 November 2017 agreement between the State of Michigan and Enbridge and the risk analysis led by Dr. Guy Meadows of Michigan Technological University.
Read the article online at: https://www.worldpipelines.com/regulations-and-standards/27032018/line-5-pipelines-to-get-additional-anchors/