lockage

noun6

1. •
   The use or transit of a canal lock.
2. •
   Materials for locks in a canal.
3. •
   The works forming a canal lock or locks.

   • This line had been constructed as provided for in the Act of incorporation of May 7, 1794, to avoid the use of lockage on the branch canals authorised as feeders to the main waterway. — 1952
4. •
   A toll or fee paid for transporting a vessel through the locks of a canal.
5. •
   (informal) A situation where things lock together.
6. •
   (no longer used) The total height difference (elevation and descent) made by the locks of a canal.

   • The entire lockage will be about fifty feet.