The infrastructure was constructed between 1903 and 1962, the first elements engineered and built by the California Oregon Power Company ("Copco").
PacifiCorp continues to operate the project for profit, producing a maximum of 169 MW from seven generating stations.
In 2016, four of the project's dams were scheduled for removal by the year 2020, pending approval by the governing Federal Energy Regulatory Commission.
[2] At the time PacifiCorp faced a relicensing cycle with Federal Energy Regulatory Commission, with potentially expensive fixes for salmon passage and to address the growth of the toxic bacteria Microcystis aeruginosa in the Copco and Iron Gate Reservoirs.
[3] Congress did not act, so as of February 2016, the states of Oregon and California, the dam owners, federal regulators and other parties reached a further agreement to remove those four dams by the year 2020, contingent only on approval by the Federal Energy Regulatory Commission.