Bradford Island Fishway
Fish Ladder at Bonneville Dam
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
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. ¾ 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. 9½ miles away); Welcome to Multnomah Falls (approx. 9½ miles away); Discover Wahkeena Falls (approx. 10 miles away). Touch for a list and map of all markers in Cascade Locks.
Categories. • Animals • Environment • Waterways & Vessels •
Credits. This page was last revised on June 16, 2016. This page originally submitted on February 22, 2016, by Don Morfe of Baltimore, Md 21234. This page has been viewed 212 times since then and 51 times this year. Photos: 1, 2, 3, 4, 5. submitted on February 22, 2016, by Don Morfe of Baltimore, Md 21234. • Bill Pfingsten was the editor who published this page.