Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 558.110

(1) Each licensee shall keep and maintain a record of all operations conducted by the licensee pursuant to the license showing the method employed, the type of equipment, the type and composition of the materials used, the times and places of operation of the equipment, the name and post-office address of each person participating or assisting in the operation other than the licensee, the estimated precipitation for each licensed project, defining the gain or loss occurring from the operations, together with supporting data therefor, and such other information as may be required by the State Department of Agriculture, and shall report the same to the department at such times as it may require.

(2) The records of the department and the reports of all licensees shall be available for public examination.