What situation would require impoundment or quarantine of a watercraft?

The requirement for impoundment or quarantine of a watercraft is crucial in preventing the spread of aquatic invasive species, particularly when live mussels are found. The presence of live mussels indicates that the watercraft is a potential carrier of these invasive species, which can have dire ecological and economic consequences for water bodies. This action is taken to ensure that the invasive species do not spread to other waterways, allowing time for appropriate decontamination measures to be implemented.

Additionally, if a boater refuses to undergo decontamination, it heightens the risk of spreading invasives as the vessel may harbor these organisms. The protocols that involve impounding or quarantining are designed to protect aquatic environments from irreversible damage caused by invasives. In these situations, immediate action is necessary to mitigate potential harm to ecosystems.

While factors like being late for a trip, underwater obstructions, or excess water accumulation may present operational challenges for a boater, they do not pose the same level of ecological threat that necessitates such stringent measures as impoundment or quarantine.