ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Pile Driving/Pile Removal

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Pile Driving near Steller Sea Lions Columbia River (up to Bonneville Dam) or within 10 mi. of known haul-out Known Haul-out Locations –See Appendix 8 Biological Monitoring –Qualifications Stop work if present within 1,200 feet –More Information About Specs Later Otherwise Observed During In-Water Work? Page/Append. references are for May 2013 User’s Guide

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Haul out locations: Three Arches Rock & Sea Lion Caves Cape Arago State Park Orford Reef & Rogue Reef Oregon Islands National Wildlife Refuge South Jetty Columbia River

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 (Appendix 8)

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 (Appendix 8)

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Pile Installation Standards relevant when ESA-fish may be present (pg 36) Concrete, Steel Round < 24” diameter, Steel H-Pile < HP24, or untreated wood pile Minimize impact hammer –Specify vibratory whenever possible –“Proofing” –No impact hammer when ESA fish <2 gm present –Sound attenuation for impact/steel piles See Appendix 7 More Information About Specs Later

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Use tide cycles Dewater area Seasonal Timing Acoustic Isolation

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 If water velocity is 1.6 fps or less, surround the pile being driven with a bubble curtain (per Appendix 7), that must distribute small air bubbles around 100% of the pile perimeter for the full depth of the water column.

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 If water velocity is greater than 1.6 fps, surround the pile being driven by a confined bubble curtain that must distribute air bubbles around 100% of the pile perimeter for the full depth of the water column.

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Bubble Curtain Requirements (Appendix 7) –Due to water depth there may be a need for multiple bubble rings –Rings should be no more than 20 in from the outside surface of the pile –The ring should be flush with the bottom substrate and attached to a frame –In a confined bubble curtain, spacers or pile guides should be included to keep the walls of the system from touching the pile being driven Pile Driving Sound Attenuation

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Confined bubble curtain: –Sufficient room at top, above the maximum water level expected So when the air delivery system is adjusted properly, curtain does not act as a water pump –Install pressure meters At all inlets of aeration pipelines and at points of lowest pressure in each branch of the aeration pipeline –Install main line flow meters at each compressor and at each branch of the aeration pipelines at each inlet –See Appendix 7 more more details Pile Driving Sound Attenuation (cont.)

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Performance: –Unconfined bubble curtains In Washington, effective up to 17 dB attenuation (9 to 12 dB more typical) –Confined bubble curtains In Washington, lack of data Other locations, effective 9 dB to 30 dB –Expectations for FAHP Env. Inspections Monitoring Pile Driving Sound Attenuation (cont.)

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Pile Removal Requirements: (pgs 37-38) –Use vibratory hammer when possible –If using crane, “wake up” (vibrate/wiggle) –Non-creosote pile Try to remove all in work zone See pg 37 for more details If breaks during removal & in a shipping/dredging channel, mark locations of broken piles with GPS Data in Project Completion Report Page # references are for May 2013 User’s Guide

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013 Removing creosote piles: –Minimize sediment disturbance & turbidity –Floating boom, equipment out of water, etc. (see pg 37-38) –Dispose as Hazardous Waste Pile Removal (cont.)

ODOT Programmatic ESA Consultation on the Federal-Aid Highway Program (FAHP) User’s Guide Training, June-July 2013