Calgary Infrastructure: Open Trenches Set to Disrupt Residents

CALGARY, AB — The City is drilling into 34 Avenue N.W. this spring, and residents along the corridor should brace for five months of open trenches, dust clouds, and blocked streets. Stage B of the Bearspaw South Feeder Main replacement—the critical water artery that fractured twice in 18 months—kicks off in May using open-cut construction, a faster but louder alternative to the micro-tunnelling approach used elsewhere on the line.

Translation: crews will rip open the road, drop in new pipe, and move on. The City says it's the only way to meet the December 2026 deadline for a project that was supposed to take years, not months.

The Trade-Off: Speed vs. Sanity

Open-cut means exactly what it sounds like—excavate a trench, install the pipe, backfill, repeat. The work will run from 73 Street N.W. to 87 Street N.W., replacing the aging main that currently sits one block south on 33 Avenue N.W. The City plans to work in large sequential sections, reopening roadways as each chunk finishes. Pipe installation should wrap by October, with final restoration dragging into late fall.

The friction: residents face "significant impacts," including traffic disruptions, parking bans, noise, dust, and restricted access to driveways and businesses. The City acknowledges the pain but frames it as necessary—every day the old pipe remains in service is a day Calgary's water system sits on a knife edge.

"Plans are rapidly evolving," the City stated, promising community engagement and mitigation efforts "where practical." No specifics yet on how parking, detours, or dust suppression will actually work.

Why the Rush?

The Bearspaw South Feeder Main ruptured catastrophically on December 30, 2025—the second major break in 18 months. The December failure triggered two weeks of voluntary water restrictions and an Alberta emergency alert as reservoir levels cratered. An independent review panel, reporting January 7, 2026, found "systemic gaps," "unclear accountability," and a "culture of risk tolerance" within the City's water utility management. The feeder main was a known high-risk asset that had been repeatedly deprioritized.

On February 3, Calgary's executive committee approved an accelerated implementation plan for the panel's recommendations, pushing the feeder main replacement ahead of schedule. Mayor Jeromy Farkas has publicly acknowledged the need to modernize infrastructure. Councillor DJ Kelly noted that previous councils "under-invested in our infrastructure" to keep property taxes low—a choice ratepayers are now paying for twice, once in rate hikes and again in construction headaches.

The Money and the Oversight

The City's 2026 water utility budget sits at $1.1 billion in capital spending and $380 million in operations, funded entirely through user rates. The 2023-2026 budget allocates $473 million specifically for water distribution, including feeder mains. Residential customers saw a 3.76% increase in monthly water bills this year; businesses absorbed hikes north of 7%.

The executive committee also recommended transferring $50 million to the utility reserve to cover costs from recent ruptures and approved withdrawing $3 million from the sustainment reserve to fund a new water utility department and an independent oversight board—five expert members tasked with advising Council on system reliability, capital investments, and risk mitigation. That board aims to operate independently from water utility management, a direct response to the review panel's findings.

What Happens Next

Full City Council votes on the implementation plan February 17. Meanwhile, site setup for Stage A—micro-tunnelling east of 73 Street—is already underway. Stage B construction begins in May. The City promises more detailed construction schedules, section maps, and community meetings in the coming weeks.

For now, 34 Avenue residents have a five-month countdown until the jackhammers arrive.

More information: calgary.ca/BSFMproject