Candrone was able to make the inspection process simple, safe, and economical for the tailrace tunnel owners while extracting the requisite data to develop a preemptive maintenance schedule when they were subcontracted to inspect the tailrace tunnel by engineering and geomatics firm McElhanney. It was the first time an inspection had been attempted since construction of the plant due to the complexity, cost, and risk associated with the exercise.
The hydroelectric generating station is situated south of Kitimat, British Columbia, a planned city built by the Aluminium Company of Canada (Alcan) in the 1950s. Constructed inside the base of Mt Dubose, it is the fifth largest electric plant in the province and supplies power to Alcan’s Kitimat smelter.
Hydroelectric power schemes typically comprise a series of underground tunnels that draw water from nearby waterways through a generating station and out to the ocean.