Albeni Falls Dam, Hydroelectric power station and gravity dam in Bonner County, US

Albeni Falls Dam is a concrete structure that spans across the Pend Oreille River between Oldtown and Priest River in northern Idaho. It holds back water to create a reservoir while housing generators and overflow channels that manage the river flow.

The project started in 1951 and was completed in 1955 as part of broader efforts to manage water resources and provide electricity to the Pacific Northwest. It represented a major investment in the region's infrastructure during that period.

The dam takes its name from Albeni Falls, a natural waterfall at this narrow point of the Pend Oreille River, named after pioneer settler Peter Albeni Poirier. The falls obstructed spring flood flows and caused flooding upstream and on Lake Pend Oreille until the dam removed the constriction.

The dam lies on the Pend Oreille River between Oldtown and Priest River, with Newport about two kilometres downstream and Priest River about five kilometres upstream. The powerhouse stands on the right bank and the ten-bay spillway on the left, separated by a small island. The reservoir level is managed seasonally, between 624.7 and 628.6 metres above sea level.

The facility uses specialized turbine designs that handle large water volumes efficiently, a technology that was advanced for its era. This engineering approach allows the operation to maintain stable function across varying water levels.