Beaver Falls Creek is located on Revillagigedo Island, on the western shore of George Inlet, 5.3 miles (8.5 km) northeast of Ketchikan, Alaska. The local name was reported in 1915 by G.H. Canfield of the U.S. Geological Survey. The stream originates in an unnamed cirque lake between Northbird Peak and Mahoney Mountain, flowing east for about 4 miles (6.5 km) through Upper Silvis Lake, over Beaver Falls, and then through Lower Silvis Lakes to George Inlet. The Beaver Falls Hydroelectric Project comprises two developments: one at Silvis Lake and the other at Beaver Falls. These projects are crucial for the Ketchikan Gateway Borough, providing approximately 30% of Ketchikan Public Utilities’ total electricity generation requirements.

The Silvis Lake Power Plant is a 2.1 MW project built in 1968 by Ketchikan Public Utilities to supply electricity to the city of Ketchikan. The Silvis Development encompasses Upper Silvis Lake and its dam, a concrete spillway, a power conduit that includes a tunnel and penstock, a single-unit powerhouse, and a transmission line. The powerhouse is situated at the southwest end of Lower Silvis Lake, near the natural outlet of Upper Silvis Lake.

Beaver Falls is a 5.4 MW facility owned and operated by Ketchikan Public Utilities. It consists of three generators built between 1947 and 1954. The development includes Lower Silvis Lake and Dam, a concrete spillway, Beaver Falls Creek Diversion Dam, two power conduits, a powerhouse, a switchyard, and a substation. The Beaver Falls Powerhouse, located along George Inlet’s shoreline, is a reinforced concrete structure measuring approximately 30 feet (9 m) by 147 feet (44 m) by 25 feet (7.5 m) high. It contains four horizontal-shaft Pelton generating units, one of which is decommissioned. Read more here and here. Explore more of Beaver Falls Creek and George Inlet here: