Movers & Shakers
LATITUDE
Terwillegar Park Footbridge Stantec’s second project to receive an Award of Excel- lence at the gala is the Terwillegar Park Footbridge in Edmonton. The first stressed-ribbon bridge in the city (and Canada’s longest), the three-span bridge stretches 262 metres across the North Saskatchewan River, connect- ing Terwillegar Park to the River Valley trail system. Like a suspension bridge but with the cables inside the deck, the bridge’s slender appearance adds to its allure. Only 60 such bridges exist worldwide. Each end of the bridge is anchored to bedrock using 77 corrosion-protected ground anchors, making it strong enough to support the weight of 16 Boeing 747s. Bridge
panels are made from pre-stressed and pre-cast concrete, allowing the deck to be cast ahead of time, lessening the project’s environmental impact, and making the bridge sturdy enough for its full lifecycle. The rope-like profile of the bridge means that it sags slightly between piers. The long-term effects of creep and shrinkage due to various load weights and different temperatures were predicted during the various stages of construction. Not only does the bridge serve its intended purpose—getting you from one side of the river to the other—but it also provides something different for pedestrians, who will notice the undulation while taking in the view.
Drayton Valley Water Treatment Plant The Drayton Valley Water Treatment Plant, developed by ISL Engineering and Land Services , is the town’s answer to a community that had outgrown its water solution. Able to treat 18 million litres of water per day and to hold 2,800 cubic metres of potable water, the new plant is certainly meeting demand. It’s also the first plant of its kind to use fibre-reinforced membranes in treating potable water, whose strength made them an appealing addition. Other features include translucent panels and light sensors to detect natural light, a solar wall to help heat Its diversion numbers are big, its technology cutting-edge, and its environmental rating impressive. The Calgary Compost Facility includes Canada’s first LEED v4–rated commercial building. Hot air from decom- position helps heat the building, but that's a fact noses won’t notice. -photo courtesy Stantec LOOKS (AND SMELLS) LIKE A WINNER—GREAT AIR AND A NEW ENVIRONMENTAL STANDARD
A LITTLE UNDULATION IS A GOOD THING Edmonton’s first stressed-ribbon bridge is the Terwillegar Footbridge, and pedestrians may notice the designed-in undulations. There’s nothing to fear, though—it’s well anchored and built to last. -photo courtesy Stantec
incoming air and reduce the energy needed to heat the plant, and windows specially coated to reflect heat. It has a cooling system with heat-exchange piping to use North Saskatchewan River water to cool the building’s air. Shade and additional cooling come from a green roof design. The facility’s Centre for Water Intelligence offers information on how Drayton Valley manages water, making water treatment information accessible to the public it serves.
20 | PEG WINTER 2018
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