Fish populations are rebounding in the streams near the former tar ponds and coke ovens areas in Sydney, Nova Scotia, indicating a positive outcome following the extensive cleanup of industrial residues from Cape Breton’s steel and coal sectors.
The $400 million remediation project was overseen by the Sydney Tar Ponds Agency, which later merged into Nova Scotia Lands and is now under Build Nova Scotia’s jurisdiction for monitoring water quality in the affected waterways.
Donnie Burke, a senior official from the agency, reported that findings by an independent engineering firm demonstrate the effectiveness of the remediation efforts. “Current observations show stability or improvement, which is highly encouraging,” Burke mentioned during a recent inspection.
The former coke ovens location was previously covered with slag rock remnants from the steel plant, while the adjacent tar ponds, once infamous as Canada’s most toxic waste site, were sealed with concrete. Coke Ovens Brook, Wash Brook, and Muggah Creek were also restored, with surrounding areas landscaped to channel surface water into these streams and groundwater from the coke ovens area treated before re-entering the water system.
Following the cleanup, both sites were capped with soil and grass. The former tar ponds have been transformed into Open Hearth Park, featuring sports fields, a playground, walking paths, and open spaces. The coke ovens site now serves as an open field for various activities like cricket, walking, and snowmobiling.
Water testing has confirmed that the tar ponds cap remains free from harmful substances. While occasional spikes in heavy metals or industrial chemicals occur at the coke ovens site post heavy rainfall, the monitoring system promptly detects and adjusts the water treatment procedures accordingly.
Recent studies from Cape Breton University revealed the return of small fish species to the streams, with trout eggs and fry spotted in Coke Ovens Brook. Dr. Katherine Jones, a CBU biologist, noted improvements in the health of mummichog fish living in the former tar ponds, indicating a positive change post-cleanup efforts.
Jones emphasized the need for further research to ascertain the impact of the remediated sites on the local fish populations. Burke reiterated the government’s commitment to monitoring the sites for 25 years post-cleanup, with regular updates on Build Nova Scotia’s website showing positive trends in the restoration progress.