WAC 296-17A-1701
Classification 1701.
1701-02 Ore reduction, by wet or dry process without
application of heat at mine
Applies to establishments engaged in the reduction of
coarse ores by a wet or dry process at a mine site. Work
contemplated by this classification involves a variety of ore
milling activities. The process begins by crushing, screening
and washing the ores. Next, ores are placed in a rotating
cylindrical mill which contains steel balls, flint pebbles,
rods or rock for further grinding. Then with the use of
amalgamation (introduction of a chemical such as mercury to
break down the ores) or flotation (uses water to separate by
buoyancy and densities), the ore material is broken down and
dried to obtain concentrated ores of metals. The milling of
ores to recover some nonmetallic minerals which do not require
amalgamation or flotation are also included within this
classification.
This classification excludes underground mining
operations which are to be reported separately in
classification 1702, and open cut mining operations which are
to be reported separately in classification 1703.
[07-01-014, recodified as § 296-17A-1701, filed 12/8/06,
effective 12/8/06. Statutory Authority: RCW 51.16.035. 98-18-042, § 296-17-548, filed 8/28/98, effective 10/1/98;
85-24-032 (Order 85-33), § 296-17-548, filed 11/27/85,
effective 1/1/86; Order 73-22, § 296-17-548, filed 11/9/73,
effective 1/1/74.]