SB 637 Sec. 2.
(e) It is unlawful to possess a vacuum or suction dredge in areas, or in or within 100 yards of waters, that are closed to the use of vacuum or suction dredges.
(f) A permit issued by the department under this section shall not authorize an activity in violation of other applicable requirements, conditions, or prohibitions governing the use of vacuum or suction dredge equipment, including those adopted by the State Water Resources Control Board or a regional water quality control board. The department, the State Water Resources Control Board, and the regional water quality control boards shall make reasonable efforts to share information among the agencies regarding potential violations of requirements, conditions, or prohibitions governing the use of vacuum or suction dredge equipment.
(g) For purposes of this section and Section 5653.1, the use of vacuum or suction dredge equipment, also known as suction dredging, is the use of a mechanized or motorized system for removing or assisting in the removal of, or the processing of, material from the bed, bank, or channel of a river, stream, or lake in order to recover minerals. This section and Section 5653.1 do not apply to, prohibit, or otherwise restrict nonmotorized recreational mining activities, including panning for gold.
SB 637 pretty much screwed us with the definition of what a dredge is considered.