North Fork Dam (Clackamas County, Oregon)
Appearance
North Fork Dam | |
---|---|
Country | United States |
Location | Clackamas, Oregon |
Coordinates | 45°14′36″N 122°16′47″W / 45.24333°N 122.27972°W |
Dam and spillways | |
Height | 206 ft (63 m) |
Length | 676 ft (206 m) |
Width (crest) | 8 ft (2.4 m) |
Width (base) | 32 ft (9.8 m) |
The North Fork Dam is on the Clackamas River, about five miles upriver from Estacada, Oregon.[1] It was built in 1958.[1] The North Fork Reservoir is behind it.
Construction
[edit]It is a concrete arched dam, 206 feet (63 m) high and 676 feet (206 m) long,[1] 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.[1]
The fish ladder
[edit]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.[2] It also required a complex system to provide for downstream fish passage around the dam.
References
[edit]- ^ a b c d "North Fork Dam and Powerhouse". The Oregon Encyclopedia. Retrieved 3 January 2016.
- ^ "North Fork Fish Ladder". The Oregon Encyclopedia. Retrieved 3 January 2016.
External links
[edit]- North Fork Reservoir Additional Information - Oregon State Marine Board
- A map
- Helping Fish Find Their Way Up The Clackamas
- The elevation, latitude and longitude