Two diesel units provide 5 MW as a back up power supply for the Salmon, Idaho area. If the community were to lose its main transmission line the diesel generators would provide needed power for customers like the hospital and utilities like telephone and power.
The units, located about a half-mile north of Salmon are operated only during outage situations or for maintenance tests to verify their continued ability to serve. The diesel units were installed in 1967.
The units are comprised of reciprocating engines that are an adaptation of railroad locomotive-type engines. They are housed in two mobile home-type structures within the Salmon substation yard.