This project consisted of four major components:
Summer and Winter Intake
Both Summer and Winter raw water intakes are made of 800mm (32”) HDPE Pipe. The first, which is situated approximately 200m from the wet well to the lake, required a major excavation for the buried portion of the pipe. A coffer dam was required and installed for the purpose of making the pipe connection between the buried and lake sections of pipe. Due to the tightness of the project schedule, the coffer dam was required to be installed in February/March of 2014 through over one meter of ice - a first for Westridge. This coffer dam required approximately 20,000 cubic meters of earth; after the work was complete, the earth was removed in September 2014. The dual in-ground intake pipes connected to over 1 kilometer of pipe that was installed by divers in open water. This pipe was first fused together in 350m (1150’) lengths on land. Concrete weights were installed, and the pipe was then floated out into the lake with a barge and boats. After final positioning, the pipe was sunk to its final resting place and joined to the in-ground pipes, which were connected to the Pump House wet well.
Zelma Pump House
A 715m2 (7700 sq ft) building that is constructed of metal-clad masonry walls and a wood-framed roof. This building has a 9.3m (30’) deep wet well that has one valve chamber, two intake chambers, and three pump chambers which hold water. The exterior and dividing walls of these chambers are 600mm (24”) thick, and they took approximately 1200m3 of concrete to construct. This building will house 8 large pumps, and will be the starting point for the water pipe line that will deliver water to the BHPB Jansen Mine almost 80km away.
Booster Pump Station
The Booster Pump Station in Lanigan is a 336m2 (3617 sq ft) building that is constructed of metal-clad masonry walls and a wood-framed roof. Its main purpose is to house two large pumps that help push the water the rest of the way to the mine.
The meter building is the last piece of this project that Westridge is responsible for. It is a 90m2 (1000 sq ft) building where the water is metered and controlled. This building is a complete wood framed structure with metal cladding on the exterior.
Zelma Lake, Saskatchewan