Calgary City Council Advances $210M Bow River Water Infrastructure and Flood Defense Agreement

CALGARY, AB — Calgary City Council voted decisively on Tuesday to endorse a landmark $210 million intergovernmental partnership with the Province of Alberta, advancing final geotechnical engineering and environmental impact assessments for an upstream flood and drought mitigation reservoir on the Bow River.

Upstream Reservoir Capacity and Dual Climate Defense

The approved project option, situated upstream of Cochrane at the Ghost Reservoir expansion zone, will provide over 150,000 acre-feet of managed water storage. City engineering models demonstrate that the reservoir will reduce flood risk for downtown Calgary by up to 60% during extreme 1-in-200-year mountain runoff events, similar to the devastating 2013 southern Alberta floods.

Critically, the reservoir is engineered with dual-use capacity, functioning during dry summer months to release regulated flows that maintain municipal drinking water intakes, support agricultural irrigation districts, and preserve aquatic habitats along the Bow River watershed.

Municipal Capital Allocation and Provincial Cost-Sharing

Under the funding formula approved by council, the City of Calgary will contribute $70 million from its municipal water utility infrastructure reserve, with the remaining $140 million funded through provincial capital grants under Alberta's Water for Life strategy.

Mayor Jyoti Gondek commended council's forward-looking vote, emphasizing that climate-resilient water infrastructure is vital to safeguard billions in downtown commercial real estate and maintain residential water security as regional population expands.

Environmental Review and Indigenous Engagement

Council directed the city administration to collaborate with Stoney Nakoda Nations and regional stakeholders throughout the provincial regulatory review, ensuring traditional land use and environmental mitigation standards are fully integrated prior to construction tendering in 2027.