1. Hydroacoustics and Transportation 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