Washington Revised Code Title 78. Mines, Minerals, and Petroleum § 78.08.070. Cut, excavation, tunnel or test hole in lieu of discovery shaft

Any open cut, excavation or tunnel which cuts or exposes a lode and from which a total of two hundred cubic feet of material has been removed or in lieu thereof a test hole drilled on the lode to a minimum depth of twenty feet from the collar, shall hold the lode the same as if a discovery shaft were sunk thereon, and shall be equivalent thereto.