ORS § 539.090
Upon the completion of the taking of testimony by the Water Resources Director, the director shall at once give notice by registered mail or by certified mail with return receipt to the various claimants and to any party who has notified the director that the party wishes to contest the claims of others, that all of the evidence will be open to inspection of the various claimants or owners. The notice shall specify the times when and the places where the evidence will be open to inspection, and the director shall keep the evidence open for inspection at the specified times and places. The earliest time for inspection shall be at least 10 days after mailing the notice; and, in the aggregate, the hours during which the director is to keep the evidence open to inspection shall at least equal 80 hours, counting only the hours between 8 a.m. and 5 p.m. during any day of the week except Sunday. The director shall also state in the notice the county in which the determination will be heard by the circuit court; provided, that the cause shall be heard in the county in which the stream or some part thereof is situated.
ORS 539.090