Prototype Evaluation of Bonneville Navigation Lock, Columbia River, Oregon
1997
Waller, Terry N.
A prototype evaluation was conducted on the new navigation lock at the Bonneville Project in March 1993, immediately after the lock was completed. Additional prototype investigations were made in September 1993 during a period of low tailwater. The lock, which is located on the Columbia River 42 miles east of Portland, OR, was evaluated to determine its operating characteristics and hydraulic efficiency. The results also evaluated the accuracy of both physical and analytical model predictions. Prototype measurements included pressures in the culvert system, valve movements, and upstream, downstream, and lock chamber water surface elevations. A system of 34 flush mounted pressure transducers was installed in the lock culverts during construction. Additional pressure transducers and potentiometers were installed and connected to recording equipment prior to data acquisition. Results indicated that the lock functioned as designed during normal (two-valve) filling and emptying operations. Pressures in the lock filling culverts and the floor manifolds showed that the flow was balanced between opposite sides of the lock.
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