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New Underground Combined Sewer Overflow Tank
New Underground Combined Sewer Overflow Tank New Underground Combined Sewer Overflow Tank New Underground Combined Sewer Overflow Tank New Underground Combined Sewer Overflow Tank

New Underground Combined Sewer Overflow Tank

Charles Caccia Park

Toronto, Ontario

Client

City of Toronto

Consultant

City of Toronto

Project Completion Date

September, 2016

Type of Contract

Lump Sum

Project Value

$9,873,000

Description

As part of the City of Toronto’s Basement Flooding Protection Program, an underground storage tank was constructed in Charles Caccia Park to help relieve flooding in the area.  In addition to the storage tank, the sewer pipes on Nairn Avenue were upgraded and an underground diversion chamber was installed at the intersection of Chudleigh Road and Nairn Avenue.

The construction of the underground combined sewer overflow storage tank involved deep excavation and construction area of approximately 45m by 25m within the west side of Charles Caccia Park.  When the capacity of the combined sewers is exceeded, the tank acts as temporary sewage storage.  Once sufficient capacity in the combined sewer system is reached, the stored sewage is pumped back into the combined sewer system.  The work included permanent park and road restoration of the affected areas.  Due to the very large underground combined sewer overflow storage tank that was installed and heavy construction equipment required to implement the work, 28 trees within the park were impacted and removed.  Park restoration included replacing the trees, restoring the landscape and adding a new splash pad.  The restoration of the park was considered an excellent opportunity for enhancing and diversifying the park for community use within the impacted areas.