North Fork Dam (Clackamas County, Oregon)

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North Fork Dam
USA Oregon relief location map.svg
Red pog.svg
Location of North Fork Dam in Oregon
Country United States
Location Clackamas, Oregon
Coordinates 45°14′36″N122°16′47″W / 45.24333°N 122.27972°W / 45.24333; -122.27972
Dam and spillways
Height206 ft (63 m)
Length676 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.

Contents

Construction

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

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

  1. 1 2 3 4 "North Fork Dam and Powerhouse". The Oregon Encyclopedia . Retrieved 3 January 2016.
  2. ↑ "North Fork Fish Ladder". The Oregon Encyclopedia . Retrieved 3 January 2016.


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