Macleod Trail water main break shuts southbound lanes between 109 Ave and Anderson Road SE
Macleod Trail water main break on July 23, 2026, closes southbound lanes between 109 Ave and Anderson Road SE in Calgary. Crews locate leaks and assess damage.
An overnight Macleod Trail water main break forced the closure of southbound lanes between 109 Avenue and Anderson Road S.E. early Thursday, July 23, 2026, city and police officials said. The disruption began after emergency crews were called to reports shortly after midnight, and authorities advised motorists to avoid the area while crews assessed and contained the situation. City of Calgary updates indicated at least one residence experienced a water service interruption as crews traced the source of the leak.
Traffic closure and immediate response
City of Calgary crews and Calgary police responded to the scene after a report at about 12:30 a.m., according to officials. Southbound Macleod Trail was blocked between 109 Avenue and Anderson Road S.E., and police issued a public advisory urging drivers to use alternate routes.
Traffic camera imagery showed standing water and crews working near the road surface, prompting concerns about roadway integrity and the potential for extended closures. Authorities did not provide an estimated reopening time immediately, saying the closure would remain in place until the hazard was fully assessed and mitigated.
How crews are locating leaks
Municipal crews deployed acoustic equipment on the surface to pinpoint the location of the break and to determine the severity of underground damage. Acoustic leak detection uses listening devices to pick up sound signatures from pressurized pipes, which helps crews narrow excavation sites and reduce the risk of damaging other utilities.
City officials also indicated they were marking other underground infrastructure, including gas and telecommunications lines, to avoid accidental strikes during excavation. That precaution is standard operating practice for complex urban repairs and is intended to speed restoration while protecting workers and the public.
Extent of service disruption to homes and businesses
The City of Calgary reported one home experienced a disruption to its water service as a direct result of the break. Officials said they were assessing whether additional properties might be affected and would provide updates if water service interruptions expanded or required precautions such as boiling notices.
Local businesses along the stretch of Macleod Trail were advised to prepare for limited access while repairs proceed. Emergency responders and city crews coordinated to maintain access for critical services, though some deliveries and customer traffic were expected to be impacted for the duration of the closure.
Safety measures and excavation plans
Before excavation begins, crews are completing surface assessments to determine asphalt and soil conditions and to ensure that digging will not compromise adjacent infrastructure. The marking of other utilities is a key step to prevent secondary damage and to allow for safer, more targeted excavation to reach the damaged pipe segment.
Officials emphasized public safety and advised pedestrians and motorists to obey signage and directed police or traffic control personnel on site. Barriers and detours were put in place to maintain a safe perimeter while work crews prepared for repair work.
Communications and public advisories
Calgary Police Service used social media early Thursday to warn motorists of the road closure and to recommend alternative routes. City updates posted to municipal channels provided technical details on detection equipment and the number of affected properties, and officials said they would continue to post progress reports as repairs advance.
Residents were encouraged to monitor official city channels for advisories about traffic diversions and any water quality notices that might follow repair work. City spokespeople said they planned to share an estimated timeline for repairs once crews confirmed the full extent of the damage and secured a safe plan for excavation and replacement.
Repairs to main distribution lines in urban corridors can vary in duration depending on the depth of the pipe, soil conditions, and the need to coordinate around other buried utilities. In similar incidents, temporary water service measures and expedited excavation techniques can reduce downtime, but full restoration sometimes requires several hours to more than a day of coordinated work.
City crews remained on site after first light to continue their assessment and to prepare for controlled excavation, with the primary objective of isolating the damaged segment and restoring safe road access as soon as practicable. Motorists were advised to plan alternate routes and expect lingering delays in neighbouring areas while work continues.
