Inglewood sanitary trunk project
About this 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 is 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 Ingle- wood 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.
Project route and timeline
What is the route for the Inglewood Sanitary Trunk?
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.
What is microtunnelling?
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.
Tree removal, replanting & repurposing
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.
Completed work
Spring 2019 to Fall 2020 - Phase One
- Construction of shafts 1 – 8
- Installation of all sections of the trunk
- Inner city tie in work at shaft 1
Spring 2021 – Construction - Phase One
- Landscape maintenance and deficiency work
Fall 2022 – Detailed Design - Phase Two
- Confirm engineering designs
- Confirm size of work areas and tree removals
Early Fall 2023 – Construction Tendering – Phase Two
- Selection of contractor
- Confirmation of construction sites and sequencing
Future work
Late Fall 2023 to Summer 2025 – Phase Two
- Construction start
Summer 2025 – Commissioning Phase Two
- Commissioning of wastewater line
- Project completion
| Location | Construction activity | Impacts | Anticipated schedule | Status |
|---|---|---|---|---|
|
Inglewood / Bow River South - 7 Avenue S.E. between 8 Street S.E. and 10 Street S.E. |
Bow River Pathway Detour |
Closure of Bow River pathway from 8 Street S.E. to 10 12 Street S.E. Detour is along 8 Avenue S.E. |
December 2023 to end of June 2025 |
Activity completed |
|
|
Site Set Up |
Noise and dust from tree removals and equipment deliveries |
December 2023 |
Activity completed |
|
|
1 Way Traffic 7 Avenue S.E. |
7 Avenue S.E. is down to one lane only with 1 way traffic flow from east to west |
January 2024 to end of June 2025 |
Activity completed |
|
|
Shaft Construction which includes secant piling using drilling rig |
Noise from drilling, concrete deliveries, trucks hauling material off site |
January 2024 to middle of March 2024 |
Activity completed |
|
|
Shaft Construction which includes excavation of material |
Noise from excavator, concrete deliveries, trucks hauling material off site |
Middle of March to end of April 2024 |
Activity completed |
|
|
Installation of Sound Wall within 7 Avenue S.E. |
Noise from equipment used to place concrete blocks within 7 Avenue SE from 9 Street SE westwards through alley |
Middle of April 2024 for 1 week |
Activity completed |
|
|
Microtunnelling |
Noise from microtunnelling equipment, noise and vibrations from material separation plant, pipe deliveries, trucks hauling material off site |
Early May to end October 2024 |
Activity completed |
|
|
Sanitary Trunk Pipe and Siphon Installation |
Noise from separation plant take down, pipe deliveries and trucks hauling material offsite |
Early November 2024 to end of February 2025 |
Activity completed |
|
|
Site Reclamation and Landscaping |
Noise and dust from removal of top 1m of concrete shaft, backfilling, work site clean up and plantings |
March to end of July 2025 |
Activity completed |
|
Removal of temporary water line |
Crews will be onsite at the northeast corner of 8 Ave and 9 St S.E. to removal the temporary water line that had previously been installed as part of phase two of this work. The line is underground in the 9 St S.E. alley and runs across 7 Ave S.E. |
Spring 2025 |
Activity completed |
|
|
Removal of temporary power source |
Crews will be onsite at the northeast corner of 8 Ave and 9 St S.E. to removal the temporary water line that had previously been installed as part of phase two of this work. The line is underground in the 9 St S.E. alley and runs across 7 Ave S.E. |
Spring 2025 |
Activity completed |
|
|
Bridgeland / Bow River North - Memorial Drive Eastbound at Baines Bridge / Calgary Zoo exit |
Bow River Pathway Detour | Closure of Bow River pathway along Memorial Drive from west end of St. Patrick's Island to Baines Bridge. Detour is through St. Patrick's Island. |
January 2024 to end of August 2025 |
|
|
|
Site Set Up |
Noise and dust from tree removals and equipment deliveries |
January 2024 |
Activity completed |
|
|
Memorial Drive Eastbound Speed Reduction |
Speed reduced to 50 km/hr through construction zone |
January 2024 to August 2025 |
Activity completed |
|
|
Shaft Construction which includes secant piling using drilling rig |
Construction activity from 7 a.m. to 7 p.m. Monday thru Saturday. Impacts include noise from drilling, concrete deliveries, trucks hauling material off site |
February to middle of April 2024 |
Activity completed |
|
|
Shaft Construction which includes excavation of material |
Construction activity from 7 a.m. to 7 p.m. Monday thru Saturday Impacts include noise from excavator, concrete deliveries, trucks hauling material off site |
Middle of April to end of May |
Activity completed |
|
|
Sanitary Trunk Pipe and Siphon Installation |
Microtunnel retrieval, installation of pipe, trucks hauling material offsite |
Early November 2024 to end of February 2025 |
Activity Completed |
|
|
Memorial Drive Eastbound |
2 Lanes of Traffic along Memorial and speed reduction Use of flaggers to bring in equipment during non-peak times |
Early February to August 2025 |
Activity completed |
|
|
Paving and Concrete Rehabilitation of Memorial Drive Eastbound |
Rotating lane closures during non-peak times, noise and odour from paving and concrete |
2 Weeks in June 2025 |
Activity completed |
|
|
Site Reclamation and Landscaping |
Noise and dust from removal of top 1m of concrete shaft, backfilling, work site clean up and plantings |
August 2025 |
Activity completed |
|
Inglewood / Bow River South - 8 Avenue S.E. and 9 Street S.E. |
Intersection closure |
No through traffic at 8 Avenue S.E. and 9 Street S.E. intersection Noise, dust and odour for opening connection to IST Phase One and paving |
Early October to end of December 2024 |
Activity completed |
|
Intersection Closure |
No through traffic at 8 Avenue S.E. and 8 St S.E. Noise and dust to remove roof slabs, repair the existing liner inside of the large sanitary chamber and reinstate and repave the road. |
End of May – August 2025 |
Activity completed |
Project background
View the Inglewood Sanitary trunk background below or download the PDF version.