Stage One Construction

Stage one construction

Mid-March 2023 to mid-2025

Stage One of the project will require significant closures to both the recreation field at Mill Creek School (Worksite#1), as well as the greenspace in Tubby Bateman Park (Worksite #2). The alignment of the trunk was selected in order to connect to existing combined trunks along 80 Avenue and 88 Avenue, as well as reduce the risk of impacting MillCreek Ravine.

During Stage One of the project, crews will construct a 30 metre deep shaft s for the tunnel boring machine (TBM), which will be used for the construction of the new tunnel. Two shafts will be constructed for the tunnel boring machine: an entry shaft at Mill Creek School, and a retrieval shaft in Tubby Bateman Park.

Construction of the entry and retrieval shaft is anticipated to take eight months to complete. Once the shaft s havebeen completed, tunneling will begin. The majority of the activity will take place at the entry shaft; the retrieval shaft site will be inactive for approximately one month after the retrieval shaft has been completed.

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The TBM will be lowered into the entry shaft and will travel north underground along 97 Street until it reaches the retrieval shaft. Underground 24/7 tunneling is expected to take place for approximately 150 consecutive days. A slurry separation machine, located at Worksite #1 near Mill Creek School, will also operate 24/7 during tunneling activities. Once the tunneling stage is complete, it will take approximately four months to convert the shafts to manholes, providing access into the tunnel for future maintenance.

Full restoration will follow and is anticipated that the school field and park will reopen in mid-2025. Once the new trunk is completed, Stage Two work will begin in order to connect existing sewer connections on 80 Avenue, between 97 Street and 96 Street, to the new trunk.

Impacts at worksite #1 (entry shaft) 80 Avenue and 97 Street

Estimated construction from mid-March to summer 2025.

Sidewalks/walkways

Pedestrians will be detoured along the west side of the construction site via a temporary walkway.

Working Hours

Typical hours of work will be from 7:00 a.m. to 7:00 p.m., Monday to Saturday. If required, these hours may be extended, and construction may occur on Sundays from 9:00 a.m. to 5:00 p.m. During tunneling, the tunnel boring machine will be running 24/7.

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Haul Route

Two haul routes from the site may be utilized in order to avoid traveling on 98 Street in front of Mill Creek School. For the main haul route, trucks will proceed north on 96 Street to 82 Avenue. In the event that this route cannot be accessed, trucks will proceed south toward 63 Avenue.
While the haul route will see increased activity due to construction, the routes will remain open to regular traffic. There may be intermittent road closures near the worksite while crews are moving equipment and materials.
Due to the proximity to Mill Creek School, no tandem trucks will travel to and from site on weekdays during school drop-off (between 8:00 a.m. 9:00 a.m.), or school pick-up (2:45 p.m. and 3:45 p.m., including Thursday early dismissal from 1:45 p.m. to 2:45 p.m.).

School Soccer Field

The soccer field goal posts will be moved further west to accommodate the site’s laydown area and allow for the continued use of the soccer field. The site will also be fenced and will use site hoarding material to block visibility and deter activity around the site.
Once construction is complete, the soccer goal posts will be moved back to their original location.

Tree Trimming, Removal and Replacement

Several trees along the fence line on the west side of 97 Street, between 79 Avenue and 80 Avenue next to Mill Creek School, have been removed.
Once construction is complete, the City of Edmonton Urban Forestry department will determine the number of trees to be replaced and the replacement locations.

Impacts at worksite #2 (retrieval shaft) 88 Avenue and 97 Street

Estimated construction from spring 2023 to mid-2025.

Traffic

There will be no parking adjacent to the worksite on 97 Street.

Sidewalks/walkways

Pedestrians will be detoured via a temporary sidewalk from the east side of the worksite to the pedestrian path on the north side of the worksite (connected to the parking lot).

Working hours

Typical hours of work will be from 7:00 a.m. to 7:00 p.m., Monday to Saturday. If required, these hours may be extended, and construction may occur on Sundays from 9:00 a.m. to 5:00 p.m.

Haul route

One haul route will be used to access this site. Trucks will proceed south from the worksite along 97 Street to 82 Avenue. There may be intermittent road closures on 97 Street near the worksite while crews are moving equipment and materials.

Tree trimming, removal and replacement

Several trees in the north east corner of Tubby Bateman Park on 97 Street will be removed. Once construction is complete, the City of Edmonton Urban Forestry department will determine the number of trees to be replaced and the replacement locations.

Tubby Bateman Park green space

The worksite for the construction of the retrieval shaft will encompass a large portion of the green space within Tubby Bateman Park.
The playground will remain open during construction, however a large portion of the park space will be closed to the public for the duration of the Stage One construction.
We are working with the City of Edmonton to relocate or store any historic resources that are currently within the work area.

Stage One Construction