Inglewood sanitary trunk project

When water runs down a sink, drain or toilet, it becomes wastewater. To manage this wastewater, sanitary trunks are constructed to deliver wastewater to one of three wastewater treatment plants. The existing sanitary trunk that carries sanitary flow from North Calgary, Airdrie and Cochrane to the Bonnybrook Wastewater Treatment Plant was nearing capacity.

The Inglewood Sanitary Trunk project added 4km of sanitary pipe to meet growing wastewater needs. This is critical to maintaining a high level of sanitary service in Inglewood, Ramsay, and surrounding communities.

Phase One of the Inglewood Sanitary Trunk (IST) was completed in November 2020. It connects the Inner City Trunk in North Inglewood to the Bonnybrook Wastewater Treatment Plant (BBWWTP).

Phase Two of the project was completed in August 2025. This phase built a new sanitary trunk to connect two existing trunks on the north and south side of the Bow River. This project will now be able to serve a growing population in Calgary’s north neighbourhoods to 2076. This new trunk is critical to maintaining a high-level of sanitary service to Inglewood and surrounding communities.

This essential work connected two existing trunks on the north and south side of the Bow River by constructing a new sanitary trunk. This allowed us to maintain a high level of sanitary service to Inglewood and surrounding communities. 

This project is now complete. 

Click on image to enlarge and view microtunnelling route.

Microtunnelling is a method of installing utilities by digging shafts and then connecting them by underground pipes rather than digging large trenches. This allows us to install the pipe with fewer disruptions to traffic and community access.

For project work, trees were removed on the North and South side of Bow River. We are working closely with City Parks to develop a remediation plan to replant new trees or repurpose trees that are removed.

Trees removed for the project will continue to play a role in the life of our community.

Some removed trees have been repurposed as benches at the City’s Greenview Area Improvements Project to rest, ponder and enjoy the bustling scene on the North side of the Bow River. This demonstrates the City’s commitment to strong community connections and thoughtful stewardship of natural resources. Removed trees and shrubs have also been sent to the Calgary Zoo for food for the animals or used in exhibits.