The Panama Canal Authority is in the process of replacing the original large bullwheels and mitre gate machinery which operate the lock gates of the Panama Canal.  The new equipment will be hydraulic.  These pictures were taken in 1974 by Bill Caddle as he went on a canal transit.

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Bullwheels at Miraflores Locks

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Bullwheel at Miraflores Locks

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Strut Arm (top of gate) attached to working bullwheel machinery
Gatun Locks

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Close-up of Strut Arm - Gatun Locks

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Gatun Lock Gate Closed

Read more about Mitre Gate Machinery

August 5, 2001