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Ashbridges Bay Treatment Plant
Ashbridges Bay Treatment Plant

Ashbridges Bay Treatment Plant

Toronto, Ontario


The City of Toronto


CH2M Hill

Project Completion Date

September, 2011

Type of Contract

Lump Sum

Project Value



The project included the refurbishing of eight existing anaerobic digestion tanks and associated control buildings, and the conversion of four existing decant tanks to digested sludge equalization tanks, at Ashbridges Bay Treatment Plant.  This refurbishment work was required to make the digester tanks structurally sound, to bring them up to Building Code standards and to improve the efficiency and performance of the digesters.  The conversion of the decant tanks was required to both maintain the digestion system hydraulic retention time required by the Ministry of the Environment during the digester construction period, and to provide additional system capacity.