• "Excavation" means any operation in which earth, rock or other material on or below the ground is moved or otherwise displaced by any means, except sidewalk, road and ditch maintenance less than 12 inches in depth that does not lower the road grade or original ditch flow line. "Excavation" does not include the tilling of soil for agricultural purposes conducted on private property that is not within the boundaries of a recorded right of way or easement for underground facilities.

    Oregon Legislature 1
    See also excavator