1650 mm Trunk Watermain along the Hydro Corridor from Bayview Avenue to Brookshire Boulevard

Client: City of Toronto
Services: Detailed Design, Contract Administration and Resident Site Inspection, Post-Construction Services

Key Features:

• 6 km of 1650 mm diameter concrete-encased, cement mortar-lined welded steel pipe watermain along the Hydro Corridor (north of Finch Avenue) from Bayview Avenue to east of Pharmacy Avenue.
• 13 tunnel crossings including Highway 404 (120m) and CN Rail as well as the arterial roads (e.g. Bayview Avenue, Leslie Street, Victoria Park, Pharmacy Avenue etc) as well as other higher volume collector roads. The CN Rail tunnel was 2400 mm Concrete pipe.
• 32 valve chambers comprising 3 line valves, 9 drain valves, 10 air release valves and 10 access chambers.

As part of ongoing upgrades to the City’s water system, and specifically to meet the increased future water demands and supply to York Region, the route for this watermain was established in a previous Route.
Selection and Environmental Assessment Study prepared by CFA. The Hydro Corridor route was strategically identified as being the most economical with mitigatable impacts.
A unique ‘open cut crossing’ of the Don River east branch included a comprehensive restoration strategy for the watercourse area and floodplain lands with native plantings.
CFA played a key role in negotiating permanent and temporary easements and crossing agreements along the Hydro Corridor (230 kv transmission lines) with Hydro One, Ontario Reality Corporation, CN Rail, and other secondary users of the Corridor such as Seneca College and some private churches. Other approvals included MTO, MOE for dewatering and C of A and gas pipeline companies and the utility companies (hydro, bell, gas) for relocations and crossings.