Hydroacoustics Ken Cannon ODOT Aquatic Biology Program ESA

Hydroacoustics Ken Cannon, ODOT Aquatic Biology Program ESA Document Training, May 26, 2010

• ODOT HAWG • Agreement on Thresholds • Hydroacoustic Specs • Attenuation • Monitoring and Reporting • Information needs for BA

ODOT HAWG • Members- ODOT, NMFS, USFWS, ODFW, Hamilton Construction • Training • Communication with stakeholders • Monitoring protocol • Specifications – Attenuation – Monitoring • Research • Information pool • Website

Hydroacoustic info on ODOT FTP site • • • Biological Opinions HAWG Meeting Notes May 14, 2009 Hydroacoustic Training Monitoring Reports NMFS Calculator ODOT Research Hammer Blow Counts Project Photos References Specifications Underwater Noise Monitoring Plan

Time History of Pile Driving Events Illingworth and Rodkin, Inc.

NMFS Pile Driving Calculator

00290. 34 (c) Specifications (7) Hydroacoustic (a) General: (b) Noise Attenuation System: (c) Underwater Noise Monitoring Plan, Monitoring, and Reporting:

Attenuation

Effect of Bubble Curtain on Pressure 30000 Pressure (Pa) 20000 10000 0 -10000 -20000 -30000 0 0. 02 0. 04 Time (sec) 0. 06 0. 08

Must extend above surface Confined Bubble Curtain Pile Sleeve Bubble Ring Must contact bottom

Monitoring and Reporting • Which projects need monitoring? • WSDOT Protocol • ODOT Protocol • Reporting

Information needs for the BA • • • Vibratory hammer and/or impact hammer detail. Type of pile (coal-tar/zinc coated pile need to be sealed) Size of pile <24”>. Number of piles (in-water/out of water). Estimated number of pile strikes per day. Life-history stages present in the Action Area. Monitoring data from previous projects with similar site conditions? Aquatic habitat types where piles will be driven (scour pools, riffles, estuary, etc. ). Substrate data from geo-tech report. Pile driving plan. Monitoring plan/report, if needed. Template in the works. In-water work timing (variance may be needed).

From WSDOT

Information Needs for a Monitoring Report…. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Size and type of piles. A detailed description of the bubble curtain, including design specifications. The impact hammer force used to drive the piles. A description of the monitoring equipment. The distance between hydrophone and pile. The depth of the hydrophone. The distance from the pile to the wetted perimeter. The depth of water in which the pile was driven. The depth into the substrate that the pile was driven. The physical characteristics of the bottom substrate into which the piles were driven. 11. The ranges and means for peak, RMS, and SEL’s for each pile. 12. The results of the hydroacoustic monitoring, including the frequency spectrum, peak and RMS SPL’s, and single-strike and cumulative SEL with and without the attenuation system. 13. A description of any observable fish or bird behavior in the immediate area will and, if possible, correlation to underwater sound levels occurring at that time.

Web links: • ODOT hydroacoustic website: ftp: //ftp. odot. state. or. us/techserv/geoenvironmental/Biology/Hydroacoustic/ • WSDOT hydroacoustic information: http: //www. wsdot. wa. gov/Environment/Biology/BA/BAguidan ce. htm Illustrations courtesy of: Bud Abbot, Environ Corporation John Stadler, NMFS Jim Laughlin, WSDOT