17
July
2025
EWN Engagements

N-EWN Seminar: The Lower Klamath Project – The World’s Largest Dam Removal and River Restoration Project

Purpose

Removal of four hydropower dams (Iron Gate, Copco 1, Copco 2, and J.C. Boyle) on the Klamath River in northern California and southern Oregon represents the largest dam removal and river restoration project in the country. The project restores free-flowing conditions and volitional fish passage to more than 400 miles of historic anadromous fish habitat upstream of the former lower-most dam site, Iron Gate. RES was selected by the Klamath River Renewal Corporation to lead restoration for this ambitious effort, as well as accept liability associated with ensuring restoration meets ecological and biological performance standards and long-term goals/objectives. RES is leading design and implementation efforts for the restoration of nearly four miles of priority tributary streams and associated fish habitat, as well as vegetation restoration for approximately 2,200 acres of previously inundated lands. This presentation provides a look back at the past two years of dam removal and restoration actions accomplished, lessons learned along the way, and how RES has positioned restoration for the years ahead.

The N-EWN Knowledge Series A Continuing Education Series about Engineering with Nature. Speaker: Dave Coffman, PG; Director, Northern California and Southern Oregon Operations | Sr. Fluvial Geomorphologist; Resource Environmental Solutions LLC. Title: The Lower Klamath Project – The World’s Largest Dam Removal and River Restoration Project. Abstract: Removal of four hydropower dams (Iron Gate, Copco 1, Copco 2, and J.C. Boyle) on the Klamath River in northern California and southern Oregon represents the largest dam removal and river restoration project in the country. The project restores free-flowing conditions and volitional fish passage to more than 400 miles of historic anadromous fish habitat upstream of the former lower-most dam site, Iron Gate. RES was selected by the Klamath River Renewal Corporation to lead restoration for this ambitious effort, as well as accept liability associated with ensuring restoration meets ecological and biological performance standards and long-term goals/objectives. RES is leading design and implementation efforts for the restoration of nearly four miles of priority tributary streams and associated fish habitat, as well as vegetation restoration for approximately 2,200 acres of previously inundated lands. This presentation provides a look back at the past two years of dam removal and restoration actions accomplished, lessons learned along the way, and how RES has positioned restoration for the years ahead. Save the date! Upcoming webinars will take place the 3rd Thursday of the month. Jul. 17, 12:30pm ET – Dave Coffman, PG; Resource Environmental Solutions, LLC; The Lower Klamath Project – The World’s Largest Dam Removal and River Restoration Project. Aug. 21, 12:30pm ET – TBD. Sep 18, 12:30pm ET – Katherine Dafforn, PhD; Co-Director, Stone Living Lab & Distinguished Professor, University of Massachusetts Boston; Co-producing Coastal Resilience: The Stone Living Lab as a Collaborative Model for Testing Nature-Based Approaches. Register at https://bit.ly/3gR9ADL. 1 Continuing Education Credit (CEC) is available to attendees. Recorded webinars will be posted online at: https://n-ewn.org/resources/n-ewn-knowledge-seminars/. Presented by: Network for Engineering With Nature, LimnoTech, University of Georgia, and US Army Corps of Engineer’s Engineer Research and Development Center. Questions? Please contact: Sage Paris, LimnoTech, sparis@limno.com.

The Network for Engineering With Nature® (EWN) invites you to the N-EWN Knowledge Series: A Continuing Education Series about Engineering with Nature—The Lower Klamath Project – The World’s Largest Dam Removal and River Restoration Project, presented by Dave Coffman, PG – Director, Northern California and Southern Oregon Operations | Sr. Fluvial Geomorphologist from Resource Environmental Solutions LLC. This 1-hour Zoom webinar will take place July 17, 2025 at 12:30pm ET.

For previously recorded seminars, please visit the N-EWN Seminars page.

Point of Contact

Director, Northern California and Southern Oregon Operations | Sr. Fluvial Geomorphologist; Resource Environmental Solutions LLC

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