The North Fork Dam is on the Clackamas River, about five miles upriver from Estacada, Oregon. It was built in 1958. The North Fork Reservoir is behind it.
Construction It is a concrete arched dam, 206 feet (63 m) high and 676 feet (206 m) long, is thin-shell of variable thickness. It varies in thickness from 32 feet (9.8 m) at the base to 8 feet (2.4 m) wide at the top.
The fish ladder North Fork's construction entailed the building of the 1.9 miles (3.1 km) long North Fork Fish Ladder, one of the longest in the world. It also required a complex system to provide for downstream fish passage around the dam.
References
External links North Fork Reservoir Additional Information - Oregon State Marine Board A map Helping Fish Find Their Way Up The Clackamas Archived 2013-08-16 at the Wayback Machine The elevation, latitude and longitude
