Port Granby Project

Port Granby Project
Name	Port Granby Project
Location	Municipality of Clarington, Ontario, Canada
Owner	Atomic Energy of Canada Limited
Operator	Canadian Nuclear Safety Commission
Type	Environmental remediation
Start	2010
Completion	2020s

Port Granby Project is a long-term environmental remediation and radioactive waste management initiative located near the community of Port Granby in the Municipality of Clarington, Ontario, Canada. The project was led by Atomic Energy of Canada Limited with oversight from the Canadian Nuclear Safety Commission and collaboration with the Government of Canada, Indigenous communities, local municipalities, and scientific consultants. It addressed legacy low-level radioactive waste from historic industrial operations through engineered containment, environmental monitoring, and regulatory compliance.

Background

Port Granby Project originated from historic operations by early 20th-century industrial and atomic research entities in the Durham Region that generated low-level radioactive waste and contaminated soil. Legacy waste streams were associated with activities linked to national programs administered by bodies such as Atomic Energy of Canada Limited, Natural Resources Canada, and Crown corporations that followed policies influenced by statutes like the Nuclear Safety and Control Act and federal stewardship practices. The site’s history involved municipal land use in Clarington, transportation corridors like Highway 401, nearby communities such as Bowmanville and Oshawa, and regional planning considerations from the Regional Municipality of Durham and the Government of Ontario.

Project Overview

The initiative comprised site investigation, engineered containment, waste relocation to an above-grade engineered storage mound, groundwater and surface water monitoring, and long-term stewardship planning. Key institutional partners included Atomic Energy of Canada Limited, the Canadian Nuclear Safety Commission, Natural Resources Canada, Infrastructure Canada, and local bodies such as the Municipality of Clarington and the Regional Municipality of Durham. Technical support and review came from consulting firms and academic institutions with experience in environmental remediation and geotechnical engineering, working alongside Indigenous organizations like the Mississaugas of Scugog Island First Nation and treaty-area stakeholders.

Environmental Assessment and Remediation

Environmental assessment for the project complied with federal review processes administered by agencies including the Canadian Environmental Assessment Agency, later transitioning responsibilities under frameworks influenced by the Impact Assessment Act and related environmental policy instruments. Remediation planning used baseline studies conducted by consultants and researchers from universities and provincial ministries, addressing hydrogeology adjacent to Lake Ontario, sediment transport, and ecosystem receptors such as migratory bird routes and freshwater fisheries. Contaminants of concern were characterized through radiological surveys consistent with standards from the Canadian Nuclear Safety Commission, Health Canada, and provincial ministries responsible for natural resources and the environment.

Engineering and Construction

Engineering work included design and construction of an engineered containment mound employing geosynthetic liners, clay cores, leachate management systems, and erosion protection measures informed by geotechnical practice and standards from institutions like the Canadian Standards Association. Construction involved earthworks, access infrastructure adjacent to provincial roads, transport coordination with agencies overseeing rail and roadway corridors, and supplier engagement from firms experienced in nuclear decommissioning and hazardous waste management. Quality assurance, occupational health and safety, and emergency preparedness followed protocols from regulatory authorities and professional bodies such as the Association of Professional Engineers and Geoscientists of Ontario and national occupational safety agencies.

Community Engagement and Indigenous Consultation

Project proponents implemented public information programs, open houses, advisory committees, and formal consultation with Indigenous rightsholders including treaty-era nations and local First Nations. Engagement activities involved municipal councils, school boards, local media outlets, stakeholder groups, conservation authorities such as the Central Lake Ontario Conservation Authority, and regional economic development entities. Indigenous consultation incorporated traditional knowledge holders, cultural heritage assessments, and participation by organizations representing Indigenous interests in federal Crown consultation frameworks.

Regulatory Framework and Funding

Regulatory oversight was provided by the Canadian Nuclear Safety Commission with permitting aligned to the Nuclear Safety and Control Act and related regulations, while environmental approvals referenced federal environmental assessment legislation and provincial statutes administered by ministries responsible for the environment and natural resources. Funding and financial accountability involved federal investment via Infrastructure Canada, budgetary allocations through the Government of Canada, and program delivery by Atomic Energy of Canada Limited under federal stewardship and audit frameworks.

Project Status and Outcomes

By the 2020s the project had substantially completed excavation, transport, and emplacement of historic low-level radioactive waste into an engineered above-grade mound with ongoing environmental monitoring and institutional controls for long-term stewardship. Outcomes included reduced contaminant risk to the adjacent shoreline of Lake Ontario, documented monitoring data reported to regulatory authorities, enhanced emergency response coordination with municipal agencies, and lessons applied to other remediation programs administered by federal and provincial bodies. Long-term stewardship remains coordinated among Atomic Energy of Canada Limited, the Canadian Nuclear Safety Commission, Indigenous partners, and municipal authorities to ensure continued protection of human health and the environment.

Category:Environmental remediation in Canada Category:Nuclear history of Canada Category:Clarington