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Hydroacoustics and Transportation Projects

Hydroacoustics and Transportation Projects. “Change is the only thing that is constant” -Heraclitus -Diogenes Laertius -Transportation Professionals. Background. Research on the effects of pile driving on aquatic organisms Scholik, A. R. and H. Y. Yan. 2001

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Hydroacoustics and Transportation Projects

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  1. Hydroacoustics andTransportation Projects • “Change is the only thing that is constant” • -Heraclitus • -Diogenes Laertius • -Transportation Professionals

  2. Background • Research on the effects of pile driving on aquatic organisms • Scholik, A. R. and H. Y. Yan. 2001 • Hastings, M. C. and A. N. Popper. 2005 • Carlson T. et al. 2007 • Heightened regulatory scrutiny of pile driving and noise attenuation measures • Hydroacoustic monitoring now occurring

  3. Hydroacoustic Working Groups (FHWG & HAWG) • ODOT, WSDOT, FHWA, NMFS, USFWS, CALTRANs interim agreement (FHWG) June 12, 2008 • Agreed-upon sound levels (206 dB peak and 183/187 SEL) • ODOT Hydroacoustic Working Group (HAWG) • Setting ODOT HA policy • Incorporating additional stakeholder input • Disseminating information

  4. Hydroacoustic Monitoring • HAWG currently addressing which projects will require monitoring • Most projects requiring impact-hammering of steel pilings in T&E species-waters will include monitoring • Initial Oregon monitoring work based on WSDOT HA monitoring template • Monitoring data will be used to guide future work and improve attenuation measures • ODOT Training May 14, 2009

  5. Hydroacoustic Attenuation Considerations • Pile size and type • In-water isolation – dewatering • Vibratory hammer vs. Impact hammer • Substrate • Water depth and flow • Bubble curtains

  6. Resources • CALTRANS guidance manual on the assessment and mitigation of HA effects (http://www.dot.ca.gov/hq/env/bio/files/Guidance_Manual_2_09.pdf) • CALTRANS fisheries bioacoustics website (http://www.dot.ca.gov/hq/env/bio/fisheries_bioacoustics.htm) • WSDOT underwater sound monitoring plan template (http://www.wadot.wa.gov/Environment/Biology/BA/default.htm#UnderwaterNoise) Stuart Myers Mason, Bruce & Girard, Inc. 503-224-3445 smyers@masonbruce.com

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