Brian Mulvey (right) and Mike Fong from the U.S. Army

Brian Mulvey (right) and Mike Fong from the U.S. Army Corps of Engineers Sacramento District release a batch of acoustically tagged steelhead trout into the Sacramento River March 26, 2013, in Knights Landing, Calif. The juveniles' downstream behavior will be studied for 75 miles and will help researchers better evaluate habitat restoration work under the Sacramento River Bank Protection Project, a joint flood risk reduction effort between the district and the state's California Central Valley Flood Protection Board to repair river bank erosion along the Sacramento River and its tributaries.