Trout Unlimited is working hard to address a serious problem impacting Washington’s watersheds and threatening the health of our native fish populations: unregulated suction dredge mining and other forms of motorized mineral prospecting.
Suction dredging is a mining method by which the bed of a stream, lake, or river is vacuumed up and processed through a sluice using a gas-powered motor to search for gold. Once the sediment is processed by equipment, it is released back out into the stream or river in a turbid sediment plume.
LINK (via: Trout Unlimited)
