Outfall repair program

Outfall Repair Program

About the program

The City’s Outfall Repair Program repairs aging and damaged outfalls that take stormwater from rainfall or snowmelt into Calgary’s rivers. There are more than 800 outfalls located across the city.

This work is beneficial because damaged outfalls can lead to storm drain backups during heavy rainfall events resulting in impacts to both public and private property and the safety of citizens.

A damaged outfall could also lead to riverbank erosion and cause damage to infrastructure like pathways, sidewalks, roads and private property, especially in the event of a flood.

 

Project Updates

May 2025

We have completed repairs to the majority of the outfall locations along the Western Headworks Canal.

This fall, work will resume to repair the last two locations, IC10 and IC13. Repair work typically takes two to three weeks to complete.

Please note that construction timelines may change depending on weather, project complexity, and site location.

The completed repairs enhance the structural integrity of the canal to ensure water can flow properly while reducing the risk of erosion and flooding. These improvements are important to ensuring the long-term sustainability of the canal system.

Work at these outfalls includes reconnecting pipes that have separated over time, installing new riprap to reduce the water’s force before entering the canal and restoring any areas on the slope that get disturbed during construction.

outfall map

Click on the map to download

This information has no legal status and cannot be used as an official interpretation of the various bylaws, codes and regulations currently in effect. The City of Calgary accepts no responsibility to persons relying solely on this information. Web pages are updated periodically. ​

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