Flap gates and stop logs are water-level control or flood retardation structures susceptible to zebra mussel macrofouling. These infestations could lead to improper sealing of a flap gate or stop logs, making a reservoir inoperable or resulting in drainage control problems. Control strategies relating to reservoir level control structures include mechanical cleaning, leaving one stop log in place permanently on the bottom (so grooves would not be fouled), and using antifouling coatings.
Preventive Control Methods
Reactive Control Methods