Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 540.390

Should any person residing on or owning land in the neighborhood of any dam, dike or other hydraulic structure after completion, or in course of construction, apply to the Water Resources Commission in writing desiring an inspection of the works, the commission may order an inspection, or the commission may make such order on the commission's own motion. Before doing so the commission may require the applicant for inspection to deposit a sum of money sufficient to pay the expenses of an inspection. If the application appears to the commission not to have been justified the commission may cause the whole or part of the expenses to be paid out of the deposit. If the application appears to have been justified, the commission may require the owner of the works to pay the whole or any part of the expenses of the inspection, and it shall constitute a valid lien against the works, which may be enforced in the same manner as provided for the enforcement of mechanic's liens.