Featured Case Studies: Manufactured Gas Plants

Collins Cove Sediment Cap

Beverly, Massachusetts, U.S.A

The Triton® Marine Mattresses by Tensar® was installed in a former manufactured gas plant (MGP) site to protect the underlying Reactive Core Mat®. This site is now protected against severe erosion caused by weather and waves.

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Island End Sediment Cap

Boston, Massachusetts, U.S.A

The sediment cap project is situated on a former manufactured gas plant (MGP) site located adjacent to the Boston Harbor. Previous remedial work included dredge and disposal in CAD cell and cap. Persistent sheen resulting from gas ebullition was apparent.

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Pine Street Canal

Burlington, Vermont, U.S.A.

A manufactured gas plant operated at the Pine Street Canal site from 1895 to 1966. The plant disposed of wastes from the gasification process, including coal tars, which migrated to a canal on the site. In addition, the sites’ history includes activities at a tie-treating facility resulting in DNAPL discharching to the subsurface. As part of many remedial efforts at the site, a sand cap was constructed in 2002 to cover contaminated sediments and restore nearby wetlands.

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Stryker Bay

Duluth, Minnesota, U.S.A

Stryker Bay was heavily polluted from the late 1800s through 1962. The harbor area was ringed with tar and coke plants, heavy industry and slaughterhouses that all discharged industrial waste into the water. The sediment in the bay, slips and part of the river is contaminated with mercury, polyaromatic hydrocarbons, lead and other toxins as well as a NAPL seep on the east side.

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