Oregon Revised Statutes Protection from Fire § 477.565

(a) If power-driven machinery is used at any location to load and assemble forest products, the operator shall fell all dead trees and snags of such size and within such distance of the equipment as may be required by rules promulgated by the State Forester.

(b) On forestland west of the summit of the Cascade Mountains, the operator shall fell all dead trees and snags within the operation area of such size, at such times and in such manner as may be required by rules promulgated by the State Forester.