Project Status Update

August 2018 - CBM Aggregates (CBM), a division of St. Marys Cement, has been exploring the feasibility and potential benefits of an underground mine adjacent to the Bowmanville Quarry. The objective of the program was to determine if this approach would provide a viable means to address the need for aggregate material (specifically high quality crushed stone) in support of construction activity in the growing Eastern Greater Toronto Area market.

CBM has made the decision to not move forward with the program after reviewing the results of further rock quality testing, specifically completed for the purpose of determining the suitability of using this aggregate in high-strength concrete. As a result, the Project has been put on indefinite hold. This will result in the withdrawal of our Environmental Assessment application with the Ministry of Energy, Northern Development and Mines (ENDM) and the cessation of related studies that were underway.

Should future evaluation of the rock quality support revisiting this project, we will communicate with stakeholders in advance of any reapplication to the ENDM.

We wish to thank the community and other interested parties for their input and consideration throughout the assessment process. Should you have any questions, please do not hesitate to reach out to:

David Hanratty
Director of Lands and Resources, VCNA Aggregates

The Project website will continue to stay live for the upcoming six months, after which the website will become inactive.

Our Proposal

CBM (Canada Building Materials) Aggregates, an operating division of St Marys Cement, is proposing to construct and operate the Bowmanville Underground Expansion Project (the Project), to be adjoining CBM Aggregates’ existing licensed quarry area situated on the shore of Lake Ontario within the Municipality of Clarington.

Our Process

We strive to have a long-term, positive impact on people and our planet. Before commencing with the proposed project, we are conducting an in-depth assessment to understand the potential environmental impact of the project and to ensure a safe operating environment for our employees and the surrounding community.

The Project

The Project will extend beyond the existing site beneath the lake to extract limestone from an underground mine to be located beneath the bed of Lake Ontario. CBM Aggregates is looking at alternative sources of limestone, including the underground sources associated with the Project, due to the increasing scarcity of high quality limestone occurring within certain parts of Ontario. We are working closely with the Ministry of Northern Development and Mines (MNDM Class EA) to plan and conduct the Environmental Evaluation process. As part of project planning, CBM Aggregates has been engaging with communities and is now formally entering the Class EA process.

Contact Us:
Your input is an important part of the planning process. If you’d like to join our mailing list or provide comments you can use the Contact Us link above. Details for community meetings and opportunities for input will be posted on this site as they are scheduled.