At over 600 m above the level of the Fraser River, nearly all of its volume is diverted through the side of a flank of Mount Cheam, part of the Four Brothers Range, to the Wahleach Powerhouse which stands beside the Trans-Canada Highway east of Bridal Falls.

When the Wahleach development was completed in 1952 it produced 14% of the power for the BC Electric Company, a predecessor to BC Hydro and a subsidiary of the British Columbia Electric Railway Company.

As of 2008, it produces less than 1% of BC Hydro's generating capacity but is ranked as one of the company's most efficient operations.

The name Jones Lake first appeared on a map in 1904 and is the main name used locally, as well as appearing on the highway signs for the Jones Lake Forest Service Road, which is the only access.

This article about a location on the Coast of British Columbia, Canada is a stub.