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“Bite-Size Bits of Local, National, and Global History”
Cascade Locks in Hood River County, Oregon — The American West (Northwest)
 

Bradford Island Fishway

Fish Ladder at Bonneville Dam

 
 
Bradford Island Fishway Marker image. Click for full size.
By Don Morfe, October 5, 2006
1. Bradford Island Fishway Marker
Inscription. Migrating fish are attracted to large flows of water coming from the Bonneville Dam. To take advantage of this natural reaction, fish-collection facilities are placed along the face of the powerhouse and at each end of the spillway dam. These collection facilities attract fish with their own flow of water, which leads fish into the fishways.

The Bradford Island fishway is a long, inclined flume with horizontal weirs creating a series of successive pools. Each pool is one foot higher than the adjacent pool downstream. Fish may swim through submerged artifices or over the wier crests to move from one pool to the next higher one.

The upper portion of the Bradford Island fishway was recently reconstructed. Instead of the weirs found in the lower reaches of the fishway, the new design creates and inclined series of vertical slots and eddy-lice pools. Biological research has shown that these inclined pools are superior for fish passage and allow for self-regulating control of water in the fishway.

As they near the top of the fishway, the fish pass the counting station and move by the winding windows. You are invited to watch the underwater viewing area located on level 1 (down the stairs).
 
Location. 45° 38.511′ N, 121° 56.633′ W. Marker is in Cascade

Bradford Island Fish Ladders image. Click for full size.
By Don Morfe, October 5, 2006
2. Bradford Island Fish Ladders
Locks, Oregon, in Hood River County. Marker is on Star Route. Click for map. This marker is located on the grounds of Bradford Island-Bonneville Dam property administrated by the U.S. Corps of Engineers. Marker is in this post office area: Cascade Locks OR 97014, United States of America.
 
Other nearby markers. At least 8 other markers are within 10 miles of this marker, measured as the crow flies. This Old Turbine (within shouting distance of this marker in Washington); Sturgeon Habitat (approx. mile away); Beacon Rock (approx. 0.9 miles away); Lewis and Clark Trail (approx. 3.7 miles away in Washington); a different marker also named Beacon Rock (approx. 3.8 miles away in Washington); Simon Benson (approx. 9.5 miles away); Welcome to Multnomah Falls (approx. 9.5 miles away); Discover Wahkeena Falls (approx. 10 miles away). Click for a list of all markers in Cascade Locks.
 
Categories. AnimalsEnvironmentWaterways & Vessels
 
Bradford Island Fish Ladders image. Click for full size.
By Don Morfe, October 5, 2006
3. Bradford Island Fish Ladders
Bradford Island Visitor Center image. Click for full size.
By Don Morfe, October 5, 2006
4. Bradford Island Visitor Center
Sign at the entrance to Bradford Island Bonneville Dam image. Click for full size.
By Don Morfe, October 5, 2006
5. Sign at the entrance to Bradford Island Bonneville Dam
 
 
Credits. This page originally submitted on , by Don Morfe of Baltimore, Md 21234. This page has been viewed 167 times since then and 6 times this year. Photos:   1, 2, 3, 4, 5. submitted on , by Don Morfe of Baltimore, Md 21234. • Bill Pfingsten was the editor who published this page. This page was last revised on June 16, 2016.
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