Page 11 - Conveyor_dec20_fb3

DUFFERIN AGGREGATES
Restoring Ashbridges Bay’s Shoreline and Aquatic Life
Dufferin Aggregates secured a contract from the Toronto and Region Conservation Authority to provide nearly 150,000 tonnes of core stone rip rap as part of the Ashbridges Bay landform project.
Ashbridges Bay is a Toronto community on the north shore of Lake Ontario which offers a host of land and water-based recreational activities to residents and visitors. The purpose of this major restoration project is threefold. The project aims to address shoreline erosion along the northeast shore of Tommy Thompson Park in addition to managing the existing sediment deposits in the harbour entrance of Coatsworth Cut which pose navigation risks due to accumulation. Finally, to offset the project’s impact on aquatic habitat, enhancements to this habitat are being put in place, hence the requirement for good- quality, locally-sourced aggregates.
Specifically, four submerged rock shoals within the headland-beach system are being put in place along with submerged rock piles, anchored log tangles and tree wads in the cobble beaches. A shoreline naturalization area is being developed near the opening of Coatsworth Cut along the Central Breakwater. There will be a gravel fill along the inner bend of the Central Breakwater as well as a vertical sunken tree field at the inner bend of the Central Breakwater.
In addition, submerged rock berms are being installed along the Eastern Breakwater. All of these efforts are expected to help sustain and enhance fish habitat in the area.
Dufferin Aggregates met and exceeded the customer’s daily tonnage requirements of approximately 1,200 to 1,500 tonnes of
following stringent requirements from the Fishery department, with work commencing during the fish spawning season. In this context, respecting the project timeline was crucial despite having to deliver the required quantities while navigating through dense and congested urbans areas to reach the project site.
large rip rap and undertook the project
DEMIX CONSTRUCTION
Back to the Dorval Interchange Worksite a Decade Later
In 2009, Quebec City and Ottawa joined forces for a planned $224-million investment in redeveloping the Dorval interchange, located on the outskirts of Montreal. Built in the 1960s, the interchange was no longer suitable for the increased traffic levels, and its congestion problems hindered access to Pierre Elliot Trudeau International Airport. The redevelopment therefore included the separation of the different types of traffic transiting through the Dorval roundabout as well as new ramps allowing drivers to travel directly between highways 20 and 520.
Demix Construction was involved in this large-scale project from the beginning of the work in 2009. A decade later, it is back on this worksite as part of the final phase of the project, which began in June 2020 and is scheduled to be completed in 2021. The quantities of materials required to complete the interchange redevelopment are in the order of 25,000 tonnes of stone, 850 cubic meters of concrete and 5,300 tonnes.
The project is highly complex in nature and requires leading-edge expertise in civil engineering, traffic control, drainage, structure and landscaping. The ramifications of the work are also significant. For example, Highway 520 had to be closed for more than two days on two occasions to speed up the pace of work.
In spite of the many modifications required throughout the project that influence the nature of the work to be carried out, the site is progressing very well. The client has already expressed their satisfaction with our productivity and professionalism. It’s been a great way to bring this project full circle 10 years later!
December 2020 | THE CONVEYOR | 11
Focused Growth