Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 547.063

(1) “Flood control project” means a system or method, including, but not limited to, canals, ditches, dikes, levees, revetments and floodwalls, for:

(2) “Obstruction” means an encroachment, improvement or trespass that substantially and adversely affects the efficient operation or maintenance of a flood control project or a ditch, lateral, drain, canal, slough, waterway or conduit.

(3) “Repair” includes replace, remove, relocate and upgrade when, in the discretion of the board of supervisors of a drainage district, replacement, removal, relocation or upgrade is necessary to comply with state or federal regulations or to protect and preserve the property of the district.