The Bearspaw South Feeder Main

Calgary's critical water artery: breaks, repairs and replacement

Last updated Aug. 30, 2026 · Sources: City of Calgary, Calgary Herald

About this timeline: The Bearspaw South Feeder Main is the largest feeder main in Calgary's water network, distributing treated water from the Bearspaw Water Treatment Plant. Built in 1975, it suffered catastrophic breaks in June 2024 and December 2025, and is now being replaced by a parallel steel pipe expected to be complete in December 2026.

Sources: City of Calgary — 2024 Bearspaw South Feeder Main Repairs · City of Calgary — Replacement project · Calgary Herald — Timeline of events