Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 545.507

(1) Borrow moneys for payment of its operation and maintenance costs and expenses in an amount not to exceed 50 percent of the operation and maintenance charge per acre for each acre within the district or the amount of its uncollected charges for operation and maintenance, whichever is greater; and

(2) Issue and deliver as evidence of the indebtedness the promissory notes of the district bearing interest. The promissory notes shall be payable at such time as its board of directors shall determine and may contain provisions for payment of the attorney fees of the holder of the notes if suit or action is commenced for the collection of the notes. The district may agree that all or any part of the uncollected incurred charges shall be applied in payment of the promissory notes when collected.