Bonneville Power Administration South Bank Substation, I-84, South of Bonneville Dam Powerhouse, Bonneville, Multnomah County, OR

Significance: South Bank Substation was one of the first substations constructed by the Bonneville Power Administration. It is historically significant because it served to energize the BPA's first transmission line, which in turn provided electricity to the agency's first customer, the City of Cascade Locks, Oregon. The substation was determined eligible for inclusion in the National Register of Historic Places in 1986.
Survey number: HAER OR-4
Building/structure dates: 1939 Initial Construction
Building/structure dates: 1987 Demolished
National Register of Historic Places NRIS Number: 86000727