North Dakota Game and Fish Department.
King County Department of Natural Resources (Washington). Water and Land Resources Division.
. Glen Canyon National Recreation Area.
It is crucial to keep the mussels from moving from Lake Powell to other lakes and rivers. Utah and Arizona state laws require you to clean, drain, and dry your boat when leaving Lake Powell using self-decontamination procedures. Additional steps are required if you launch on other waters without a significant drying period or if you are on Lake Powell for more than 5 days.
Washington Department of Agriculture.
Thurston County Noxious Weed Control (Washington).