Mitchell Point Viewpoint. Columbia River Gorge National Scenic Area. Oregon. May 2, 2013
Historic Columbia River Highway Van Tour with Peg Willis. Pendleton Parks & Recreation. Oregon & Washington. June 21, 2014.
Copyright © 2014 A. F. Litt, All Rights Reserved
Via Scott Cook, Curious Gorge Blog.
Oregon State Archives - A 1940 Journey Across Oregon:
Display of Mitchell Point HAER Drawings (2013)
State Trail Visitor's Center. HCRH. Columbia River Gorge National Scenic Area. Oregon. May 9, 2013.
Mitchell Point: Tunnel & Viaduct, 1915
Historic American Engineering Record, National Park Service, Mitchell Point Tunnel & Viaduct 1915, Pete Brooks, 1995
Curious Gorge Guidebook / Curios Gorge (https://www.facebook.com/curios.gorge) has a lot of good stuff on the old Mitchell Point Tunnel here: