OAR 629-615-0200: Mechanical Site Preparation Near Waters of the State

(1) When mechanical site preparation is necessary in riparian management areas or near waters of the state, operators shall conduct the operations in a way that sediment or debris does not enter waters of the state. (2) When using mechanical site preparation, operators shall provide adequate distance between disturbed soils and waters of the state to filter sediment from run-off water. (3) Operators shall not use mechanical site preparation in riparian management areas: (a) On slopes over 35 percent, with the exception of excavator-type equipment used during dry periods; or (b) On sites with evidence of surface or gully erosion; or (c) Where exposure or compaction of the subsoil is likely to occur. (4) During mechanical site preparation, operators shall not place debris or soil in waters of the state or where it may enter waters of the state.