Tar Ponds and Coke Ovens Site Solidification and Stabilization

Industry: Mining and Metals

Location: Canada

The Tar Ponds were filled with waste from a steel mill and coke oven, transforming the tidal estuary with impacted sediments and sludge. The governments of Canada and Nova Scotia announced a plan to clean up the site and establish Open Hearth Park, a community gathering place.

ENTACT developed solidification and stabilization mix designs in our treatability lab. We then confirmed the recommended formula through a successful field pilot program. Our scope included solidification and stabilization of approximately 745,000 cubic yards of impacted soft sediment; construction of a lined channel through the solidified and stabilized mass to convey stormwater discharge from the city of Sydney into the harbor; and installation of a sitewide cap over the treatment areas.