lockage

• POS: Noun
• HYPHEN: lock=age

CIDE DICTIONARY

lockage, n. 

•  Materials for locks in a canal, or the works forming a lock or locks.  [1913 Webster]
•  Toll paid for passing the locks of a canal.  [1913 Webster]
•  Amount of elevation and descent made by the locks of a canal.  [1913 Webster]

  "The entire lock will be about fifty feet."  [1913 Webster]

OXFORD DICTIONARY

lockage, n.
1 the amount of rise and fall effected by canal locks.
2 a toll for the use of a lock.
3 the construction or use of locks.
4 locks collectively; the aggregate of locks constructed.