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Portland & Southwestern Railroad Tunnel

Photos 

Western Portal Showing Hillside And Approach, Looking East

Photo taken for the Historic American Engineering Record

View photos at Library of Congress

BH Photo #278729

Map 

Description 

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

Facts 

Overview
Abandoned tunnel on Portland and Southwest Railroad
Location
Columbia County, Oregon
Status
Derelict/abandoned; tracks removed around 1943
History
Built 1910
Builders
- Chapman Timber Co. of Chapman, Oregon
- Nehalem Timber & Logging Co. of Scappoose, Oregon
- Porter Brothers Co. of Spokane, Washington
Railroad
- Portland & Southwestern Railroad
Design
Tunnel
Dimensions
Total length: 1,712.0 ft.
Deck width: 16.0 ft.
Vertical clearance above deck: 22.6 ft.
Recognition
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:
Bacona
Inventory numbers
NRHP 81000481 (National Register of Historic Places reference number)
BH 60188 (Bridgehunter.com ID)

Update Log 

  • July 22, 2017: New photos from Mike Garland
  • March 9, 2014: Added by Dave King

Sources 

  • 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