Bulkhead

Bulk·head

Bulkhead

n.
  1. A partition in a vessel, to separate apartments on the same deck. (Naut.)
  2. A structure of wood or stone, to resist the pressure of earth or water; a partition wall or structure, as in a mine; the limiting wall along a water front.

Phrases & Compounds
Bulked line
a line beyond which a wharf must not project; -- usually, the harbor line.