Fish populations are thriving in the streams surrounding the former tar ponds and coke ovens areas in Sydney, Nova Scotia, indicating successful ecological recovery following a $400-million cleanup operation. The remediation project, overseen by the Sydney Tar Ponds Agency and later integrated into Nova Scotia Lands under Build Nova Scotia, has shown positive results, according to Donnie Burke, a senior director involved in the effort.
The cleanup involved covering the coke ovens ground with slag rock and encapsulating the tar ponds, previously known as one of Canada’s most polluted sites, in concrete. Additionally, Coke Ovens Brook, Wash Brook, and Muggah Creek underwent restoration, with the surrounding landscapes designed to channel surface water to the streams. Groundwater from the coke ovens area is treated before re-entering the environment. Both sites were then landscaped with topsoil and grass.
The former tar ponds have been transformed into Open Hearth Park, offering recreational amenities like sports fields, playgrounds, and walking paths. Conversely, the coke ovens site now serves as open space for activities like cricket, walking, and snowmobiling. Water quality tests confirm that the tar ponds remain toxin-free, while occasional spikes in heavy metals or industrial chemicals from the coke ovens site are promptly managed through water treatment adjustments.
Water testing in the streams and under the coke ovens cap continues through strategically placed wells. Recent findings from Cape Breton University reveal the return of fish species to the area, including trout eggs and fry in Coke Ovens Brook, indicating improved environmental conditions. Dr. Katherine Jones, a CBU biologist, noted a positive shift in the health of mummichog fish, which previously exhibited abnormalities but have shown improvement post-cleanup.
Ongoing monitoring by the government, scheduled for 25 years after the cleanup, highlights a positive trend in the area’s environmental recovery. Regular updates on the sites’ status are available on Build Nova Scotia’s website. Burke emphasizes the importance of continued monitoring to ensure sustained progress in restoring the ecosystem.