Remember you must self-certify and display your quagga form PRIOR to launching your vessel. If you have been to contaminated water, including Lake Powell, you must Clean, Drain, and Dry your vessel or be professionally decontaminated prior to launching at another water body. The dry time during the spring is 18 days. If you have been to Lake Powell or out-state-waters, and if you have a more complex boat with ballast tanks, in/outboard motors with unverified water, etc, then you must wait 30 days to dry or get professionally decontaminated regardless of the time of year. Mussels are getting into ballast tanks and sea strainers after being in Lake Powell one time.