2024 Top 50 Water Projects Report - Report - Page 22
TOP 50 WATER PROJECTS 2024
15
Stanley Park Water Supply Tunnel
$370 million
Location: Vancouver, B.C.
Owner: Metro Vancouver
Substantial Completion: 2029
16
Jean R. Marcotte Wastewater Treatment Plant
$360 million
GETTY IMAGES
TO MEET the growing demand for drinking water in the region, Metro
Vancouver is planning to construct a major water infrastructure project,
called the Stanley Park Water Supply Tunnel, deep under Stanley Park.
The new water supply tunnel will replace an existing water main that
was built in the 1930s and is at the end of its service life.
Metro Vancouver is planning to tunnel deep underground to build
a new water main and two valve chambers. The valve chambers will
house underground pipes and valves to control the flow of water
through the mains in the area. The new main and valve chambers will
then be connected to the existing water distribution system.
To excavate the tunnel, install the water main and build the valve
chambers, three shafts will be constructed in Stanley Park. The
shaft locations, along with the tunnel alignment and construction
process, were carefully selected based on rigorous geotechnical,
environmental, archaeological, technological and traffic studies. At
all three shaft sites, the construction areas will be restored to equal or
better condition.
The project is in the detailed design stage and construction is
expected to begin in late 2024 through 2029. When complete, the
new tunnel will meet current seismic standards, help ensure the
continued reliable delivery of high-quality drinking water to the cities
of Vancouver and Richmond, and increase the capacity of the existing
system for the region’s growing population. •
Location: Montreal, Que.
Owner: City of Montreal
Substantial Completion: 2025
WORK AT the Jean-R.-Marcotte is being done so that wastewater can be
treated by ozonation, a procedure that consists of injecting ozone at the end
of the treatment process.
Ozonation is a very advantageous solution from an environmental
perspective. A number of elements must be implemented to use this
technology. Work will be completed in several steps in order for ozonation to
be implemented in 2025.
The treatment capacity of this station were reduced during two six-month
periods between November 2022 and April 2023 as well as between
November 2023 and April 2024. On sunny days, the station can process
wastewater normally. However, runoff is inevitable during heavy rains or
when snow melts.
To measure runoff and control its impact, a study was conducted using
statistics from the past 10 years. The study estimates that the volume of
water that could be discharged into the St. Lawrence would be six times
weaker per hour than during the construction that took place in 2015.
Moreover, the runoff would mainly be composed of rainwater and mixed with
a portion of wastewater.
As well, the treatment station has an integrated control system to prioritize
run-off sites. When flooding occurs, water will be directed to the areas of
the river that are the least likely to affect human and aquatic health.
The Jean-R.-Marcotte treatment station is the third largest in the world. It
treats 45 per cent of Québec’s wastewater, which represents an average of
2.3 million cubic metres per day—more than an Olympic stadium each day.
It operates 24 hours a day and 350 employees keep it running smoothly. •
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WATER C AN ADA’S TOP 50 WATER PRO JEC T S
WAT E R C A N A D A . N E T
