Portland & Southwestern Railroad Tunnel
The Portland and Southwestern Railroad Tunnel is one of the longer semi-temporary railroad tunnels built for logging transport in Oregon and the only tunnel to cross the divide of the Oregon coastal range. It provides a unique surviving example of the timber construction typical of the early twentieth century before tunnel linings were improved by cement or masonry overlaying the timbers. The railroad tunnel was built solely for the purpose of transporting timber and served to open up the rich Nehalem Valley to loggers.
-- Historic American Engineering Record
- Abandoned tunnel on Portland and Southwest Railroad
- Columbia County, Oregon
- Derelict/abandoned; tracks removed around 1943
- Built 1910
- - Chapman Timber Co. of Chapman, Oregon
- Nehalem Timber & Logging Co. of Scappoose, Oregon
- Porter Brothers Co. of Spokane, Washington
- - Portland & Southwestern Railroad
Total length: 1,712.0 ft.
Deck width: 16.0 ft.
Vertical clearance above deck: 22.6 ft.
Posted to the National Register of Historic Places on August 17, 1981
- Also called
- Nehalem Divide Railroad Tunnel
- Approximate latitude, longitude
- +45.83093, -123.04939 (decimal degrees)
45°49'51" N, 123°02'58" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 10/496163/5075264 (zone/easting/northing)
- Quadrangle map:
- Inventory numbers
- NRHP 81000481 (National Register of Historic Places reference number)
BH 60188 (Bridgehunter.com ID)
- July 22, 2017: New photos from Mike Garland
- March 9, 2014: Added by Dave King
- Dave King - DKinghawkfan [at] hotmail [dot] com
- HAER OR-3 - Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman, Columbia County, OR
- Mike Garland - Rapier342 [at] comcast [dot] net