North Channel Dam- Post Falls, Idaho
Silver Valley mining interests sold this hydroelectric site to Washington Water Power in 1901 so that reliable electric power could be provided to the mines around Kellogg, Wallace, and Burke, Idaho. To bring power to these North Idaho mines WWP built what was in 1901, the world’s longest high-voltage transmission line. In 1906, the Post Falls Project, which includes three dams, began generating electricity.
The project is one of the finest examples of early 20th century hydroelectric technology in the Northwest. The initial installed capacity was 11,240 kilowatts. In 1980, projection capacity increased to 18,000 kilowatts.
High Bridge- Post Falls, Idaho
The concrete arch bridge was designed by the Washington Water Power Co. in 1929. Grant Smith and Company of Spokane finished construction of the bridge the following year at a total cost of $22,948.00. The bridge replaced a wooden structure which provided both railroad and motor vehicle access to the island during the construction of the North Channel Dam and powerhouse.