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Annacis Island Wastewater Treatment Plant: Stage 5, Phase 1 Upgrade

Delta, British Columbia

Aecon has teamed up with Graham Infrastructure to rehabilitate the Annacis Island Wastewater Treatment Plant. Aecon is working on critical upgrades that will allow the plant to meet the needs of a growing population in Metro Vancouver, strengthen its ability to operate in the event of an earthquake, and adapt to climate change. The team will ultimately pour 58,000 m3 of concrete, weld out 61,000 diameter inches of process piping and complete over 200 plant tie-ins with the aid of the innovative BIM 3D modelling system.

CLIENT
Metro Vancouver

VALUE
$252 million

START DATE
2017

ESTIMATED COMPLETION
2021

300
EMPLOYEES ON-SITE AT PEAK

1.25M
RESIDENTS SERVICED BY THE PLANT ANNUALLY

175B
LITRES OF WASTEWATER TREATED BY THE PLANT

The team is tasked with:

  • Constructing five new primary sedimentation tanks to supplement the plant’s existing tanks and to filter out everything from heavy solids and lighter oils to soap and scum from the sewage that enters the plant prior to going into the next stage of filtration.
  • Building six new clarifiers that will continue to remove particles from the wastewater prior to its final treatment stage and before entering the Fraser River.
  • Constructing 800 metres of channels and tunnels.
  • Performing more than 150 critical tie-ins to the existing mechanical/electrical systems as well as upgrades to the plant’s existing systems. Secondary systems, such as HVAC, will also be added to various structures.
  • Building two new facilities: an electrical building, which will house all of the major electrical Motor Control Centres (MCC) for the primary portion of the sewage treatment plant, and a primary odour control building, which has new, installed equipment to help stop odours from escaping the plant into the surrounding area.
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