Built in the 1940s, the John Hart Dam is about 32 metres tall and more than 800 metres long. The project work will include upgrades to the earthfill and concrete sections of the dam; creating an overflow spillway under the road deck near the spillway; and replacing the three spillway gates and related works. In the fall of 2023 concrete work on a spillway section of the dam, as well as on a water seepage barrier. A narrow trench will be excavated, about 20 metres deep and concrete panels will be placed within the hollow to act as an additional water seepage barrier.
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