lockage
    n 1: a fee charged for passage through a lock in a canal or
         waterway
    2: a system of locks in a canal or waterway
    3: passage through a lock in a canal or waterway

Lockage \Lock"age\, n.
   1. Materials for locks in a canal, or the works forming a
      lock or locks.
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   2. Toll paid for passing the locks of a canal.
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   3. Amount of elevation and descent made by the locks of a
      canal.
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            The entire lock will be about fifty feet. --De Witt
                                                  Clinton.
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