Owned and operated by Canadian Hydro Developers, the Upper Mamquam Hydro Plant is a run-of-river hydro project located 10 kilometres east of Squamish, upstream of a 15-metre waterfall on the Mamquam River. Water from the Mamquam River is diverted through a penstock into turbines located in the powerhouse downstream. The water turns the turbines generating 25 MW of power and is returned to the river directly below the powerhouse. The distance from the water intake to the powerhouse of the Upper Mamquam Hydroelectric Project is 1.7 kilometres. At full flow, 513 million gallons of water per day (at 27 cubic meters per second) pass through the turbines. Unique features of the plant include a 145 metre tunnel allowing the buried steel penstock to pass through a rock wall and a bypass valve for uninterrupted river flow.

The $39 million project will provide enough energy to serve almost 10,000 homes and construction was completed in less than two-and-a-half years. Canadian Hydro Developers worked closely with the Squamish First Nations, government and outdoor recreational organizations to make this project a success.

Canadian Hydro Developers CEO John Keating said, "This new power plant is a perfect example of balancing the needs of the environment with responsible economic development. We know green electricity builds sustainable communities. Environmentally, the Upper Mamquam Hydroelectric Plant generates virtually zero emissions."

This project is currently seeking EcoLogo Certification.