Section 1 Introduction - National Marine Fisheries Service - NOAA

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NBK at Bangor EHW-1 Pile Replacement Project Final Marine Mammal Monitoring Report 13. Observed Pinniped Behaviors ........................................................................................................... 55 14. Observed Pinniped Behaviors (Percent of Total) .............................................................................. 55 15. Cetacean Behaviors Before, During, and After Pile Driving ............................................................ 59 16. Pinniped Behavioral Events Observed Before, During, and After Pile Driving ............................... 60 17. Cetacean Behaviors by Construction Type ....................................................................................... 61 18. Pinniped Behaviors by Construction Type ........................................................................................ 62 Tables 1. Project Staff ......................................................................................................................................... 5 2. Summary of Monitoring Effort for the Hood Canal EHW-1 Pile Driving Project ............................. 6 3. Pile Specifications for Piles Installed and Removed at EHW-1 ....................................................... 16 4. Summary of Underwater Sound Levels During Vibratory Pile Installation and Removal ............... 23 5. Modeled and Measured Marine Mammal Behavioral Harassment RMS Sound Level Thresholds for Vibratory (120 dB) Pile Driving ............................................................................... 27 6. Summary of Airborne Sound Levels During Pile Driving ................................................................ 28 7. Airborne RMS Levels for Vibratory Pile Driving at WRA Boat (dB re 20 µPa) All Data From Various Distances Normalized to 100 meters ......................................................................... 33 8. Summary of Marine Mammal Sightings during EHW-1 (Construction and Non- Construction Periods) ........................................................................................................................ 34 9. Summary of Marine Mammal Sightings During EHW-1 PRP (Construction Only) ........................ 36 10. Summary of Underwater and Airborne Marine Mammal Takes During the EHW-1 PRP ............... 37 11. Missed Takes in the Unmonitored Area of the Behavioral Harassment Zone .................................. 41 12. Marine Mammal Mitigation Events During the EHW-1 PRP .......................................................... 42 13. All Harbor Porpoise Sightings .......................................................................................................... 45 14. All Steller Sea Lion Sightings ........................................................................................................... 47 15. Cetacean Behaviors by Distance from Pile (During Construction Activity Only) ........................... 56 16. Pinniped Behaviors by Distance From Pile 1 (During Construction Activity Only) .......................... 56 17. Cetacean Behaviors Observed During Construction Versus Non-Construction Periods During EHW-1 PRP .......................................................................................................................... 56 18. Pinniped Behaviors Observed During Construction Versus Non-Construction Periods During EHW-1 PRP .......................................................................................................................... 58 19. Cetacean Behaviors Observed Before, During, and After Pile Driving Activities During EHW-1 PRP ...................................................................................................................................... 58 20. Pinniped Behaviors Before, During, and After Pile Driving ........................................................... 59 21. Cetacean Behaviors by Construction Type ....................................................................................... 60 22. Pinniped Behaviors by Construction Type ........................................................................................ 61 Bangor, Washington ii
NBK at Bangor EHW-1 Pile Replacement Project Final Marine Mammal Monitoring Report Acronyms and Abbreviations dB decibel(s) dB re 1 μPa dB referenced to 1 micropascal DON Department of the Navy EC exclusion zone EHW Explosives Handling Wharf EHW-1 PRP Explosives Handling Wharf #1 Pile Replacement Program EA Environmental Assessment ESA Endangered Species Act ft foot/feet GPS Global Positioning System HQ Headquarters ICMP Integrated Comprehensive Monitoring Program IHA Incidental Harassment Authorization km kilometer(s) km 2 square kilometer(s) m meter(s) mi 2 square miles MC Monitoring Coordinator MMO Marine Mammal Observer MMPA Marine Mammal Protection Act NBK Naval Base Kitsap NMFS National Marine Fisheries Service NWR Northwest Region nm nautical mile(s) nm 2 square nautical mile(s) OD outside diameter RMS root mean square SLM sound level meter SPL sound pressure level SSP Strategic Systems Programs SSV vibratory soft start TPP Test Pile Program TRIDENT TRIDENT Fleet Ballistic Missile U.S. United States USFWS United States Fish and Wildlife Service USCG United States Coast Guard V vibratory VHF very high frequency WRA Waterfront Restricted Area ZOI zone of influence Bangor, Washington iii
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APPENDIX A U.S. Navy EHW-1 Pile Rep
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Bangor, Washington A-3
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Section 1 Introduction - National Marine Fisheries Service - NOAA

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