Fish populations are rebounding in the streams surrounding the former tar ponds and coke ovens sites in Sydney, N.S., signaling a positive outcome following the extensive cleanup of decades of industrial pollution from the steel and coal sectors in Cape Breton.
The $400 million remediation project was overseen by the Sydney Tar Ponds Agency, later integrated into Nova Scotia Lands and now under the purview of Build Nova Scotia, responsible for monitoring water quality in the streams running through the former industrial areas. Donnie Burke, a senior official with the agency, highlighted that assessments by an independent engineering firm confirm the effectiveness of the remediation efforts.
The coke ovens area was covered with residual slag rock from the former steel plant, while the infamous tar ponds, once Canada’s most hazardous waste site, were sealed with concrete. Additionally, Coke Ovens Brook, Wash Brook, and Muggah Creek underwent cleanup, with the surrounding areas landscaped to channel surface water into the streams and groundwater from the coke ovens directed to a treatment facility before returning to the water bodies. Topsoil and grass were laid over both sites.
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 used for recreational activities like cricket, walking, and snowmobiling during winter.
Water testing results indicate that the tar ponds containment is secure, with no release of toxins. Although occasional spikes in heavy metals or industrial chemicals occur at the former coke ovens site, particularly after heavy rainfall, the monitoring system promptly detects and adjusts the water treatment process.
A recent study conducted by Cape Breton University revealed the return of small fish species to the streams, with trout eggs and fry observed in Coke Ovens Brook, a promising development according to provincial officials. Dr. Katherine Jones, a CBU biologist, noted improvements in the health of mummichog fish previously living in the tar ponds, showcasing signs of enhanced well-being post-remediation efforts.
Ongoing monitoring of the sites for 25 years post-cleanup is a government commitment, with regular updates available on Build Nova Scotia’s website. Burke emphasized that the monitoring progress indicates a positive trend, with the sites moving in the right direction.