NMFS-NC-BO-IWW-16

Sound Monitoring during in-water Pile Driving

Sound monitoring will be done, if monitoring is possible due to water depth, to ensure that cSEL injury levels are not exceeded. If levels are met, then pile driving shall cease for a minimum of 12 hours. Attenuation measures include the following:
● A cushioning block could be used between the hammer and pile
● A confined or unconfined air bubble curtain shall be used.