Sproat Lake CSP Reline
Owner:BC Ministry of Transportation and Infrastructure
Contractor:Mainroad Mid-Island Contracting LP and Coastal Bridge & Construction Ltd.
Location:Sproat Lake, B.C.
Product Utilized:
SteelCor Corrugated Steel Pipe
The Challenge
The project location was difficult to access, with limited right of way. Furthermore, a nearby natural pond required a tight construction window in order to comply with fish habitat protection regulations. Finally, as the only road for reaching local communities, full closure was not an option.
The Solution
Rehabilitation was eventually selected over the replacement of the aging structure. Armtec proposed the use of Aluminized Type 2 CSP measuring 3,300mm in diameter with internal couplers. The Aluminized Type 2 coating would provide an extended service life of 75 years. In order to minimize disruption to the fish habitat and maintain environmental compliance, the contractor, Coastal Bridge & Construction, under the direction of Mainroad Mid-Island Contracting, were able to install the pipe using a sliplining technique within less than eight hours inside the host pipe. The pipe was successfully encased in grout utilizing the grout ports provided. Both the Ministry of Transportation and Infrastructure, and the contractor were very pleased with the results. Disruption to traffic was minimized as the majority of the work was kept off the road. Aluminized pipe provided a lightweight, economical choice that fit easily within the existing structure.