Oregon Revised Statutes Mineral Resources § 517.130

(a) “Bedrock sluice” means a wood or metal flume or trough that is permanently attached to the bedrock of the creek and is equipped with transverse riffles across the bottom of the unit and used to recover heavy mineral sands.

(b) “Deface” includes but is not limited to altering, pulling down, damaging or destroying.

(c) “Dredge” means a subsurface hose from 1.5 to 10 inches in diameter that is powered by an engine and is used to draw up auriferous material that is then separated in the sluice portion of the unit.

(d) “Flume” means a trough used to convey water.

(e) “Quartz mill” means a facility for processing ores or gravel.

(f) “Rocker box” means a unit constructed of a short trough attached to curved supports that allow the unit to be rocked from side to side.

(g) “Sluice box” means a portable unit constructed of a wood or metal flume or trough equipped with transverse riffles across the bottom of the unit and that is used to recover heavy mineral sands.

(a) Enters a mining claim posted as required in ORS 517.010 or 517.044 and disturbs, removes or attempts to remove any mineral from the claim site;

(b) Tampers with or disturbs a flume, rocker box, bedrock sluice, sluice box, dredge, quartz mill or other mining equipment at a posted mining claim; or

(c) Defaces a location stake, side post, corner post, landmark, monument or posted written notice within a posted mining claim.