Green River Gorge Seismic Retrofit Zhengjie Zhou, Ph.D., P.Eng. King County DOT, Seattle, WA Seismic Retrofit of an Historic Steel Arch Bridge: Lessons Learned Barbara S. Moffat, P.E., Jacobs Engineer, Bellevue, WA Foresthill Bridge Seismic Retrofit Project [mpg] [mpg] Mark Reno, P.E., John Quincy, P.E., Quincy Engineering, Inc., Sacramento, CA