Pile driving noise and mitigation

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Impact pile driving is common during construction projects within the critical habitat of the southern resident killer whales. Here we attempt to gather calibrated measurements of pile driving source levels and mitigation effectiveness.

-- [Cape_Disappointment_Pile_Driving_Report_Final_3-06revised_.pdf Cape Disappointment experiments] Jim Laughlin of WADOT assesses mitigation potential of bubble curtains and different cap materials.

Recordings made via Salish Sea Hydrophone Network: