Idlewild dam was built in the 1930s and is an earth-fill dam with a concrete core. The city has said that the dam is classified as a very high consequence dam by the Ministry of Forests Lands and Natural Resource Operations. The Dam Breach Inundation Study noted if the dam failed, the uncontrolled release of water from Idlewild Lake would follow Joseph Creek through town and potentially flood up to 21 per cent of the city. City council needs to lower the lake as a temporary measure to protect the public, but would revisit the matter in the future. Now the dam is being removed and the lake drained.
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