“Ice cluster” means 2 or more pilings installed closely together near the lakeward end of a docking structure to protect the structure against damage from ice.

Source. (See Revision Notes #1, #2, #3, and #4 at Chapter heading for Env-Wt 100) #12801, eff 12-15-19; renumbered by #13945 (formerly Env-Wt 103.18)