The ongoing legal battle over the Three Sisters Mountain Village development in Canmore, Alberta, has taken another turn as the Alberta Court of Appeal dismissed appeals from both sides, effectively upholding previous court decisions. The dispute, which has been ongoing for years, centers on the approval and conditions of the large-scale residential and commercial project near the iconic Three Sisters peaks.
Background of the Case
The Three Sisters Mountain Village is a major development planned for the Bow Valley, intended to include thousands of homes, commercial spaces, and recreational facilities. However, environmental groups and some local residents have challenged the project, citing concerns about wildlife corridors, water resources, and the impact on the natural landscape. The legal proceedings have involved multiple parties, including the developer, the Municipality of Canmore, and environmental organizations.
Appeals Dismissed
On June 10, 2026, the Alberta Court of Appeal dismissed the appeals brought forward by both the developer and the environmental groups. The court found no errors in the lower court's interpretation of the law or in the approval process. The decision means that the previous rulings, which upheld the development's approvals subject to certain conditions, remain in effect.
Key Points from the Ruling:
- The court affirmed that the environmental impact assessments were conducted properly and met legal standards.
- Conditions imposed on the developer, including measures to protect wildlife and water quality, were deemed reasonable and enforceable.
- The court rejected arguments that the municipality had exceeded its authority in granting approvals.
Reactions and Next Steps
Environmental groups expressed disappointment with the ruling, stating that the development still poses significant risks to the sensitive mountain ecosystem. The developer, meanwhile, welcomed the decision as a step forward, noting that the project can now proceed with the required mitigations. The Municipality of Canmore has indicated that it will continue to monitor compliance with the conditions.
The legal battle may not be entirely over, as parties could seek leave to appeal to the Supreme Court of Canada. However, legal experts suggest that the high court is unlikely to hear the case given the thoroughness of the appellate decision.
Broader Implications
This case has been closely watched by developers, environmentalists, and municipalities across Alberta, as it sets a precedent for balancing economic development with environmental protection in the province's mountain regions. The outcome reinforces the importance of rigorous environmental assessments and the ability of local governments to impose conditions on large projects.
