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Chapman vicinity

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Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman, Columbia County, OR



B&W Photos

HB991961
Western Portal Showing Hillside And Approach, Looking East

HB991962
Western Portal, Looking East

HB991963
Western Portal And Approach, Looking Southeast

HB991964
Western Portal And Approach, Looking Northeast

HB991965
North Wall Of Western End, Looking North

HB991966
Detail Showing Method Of Splicing Caps And Sills

HB991967
Detail Showing Joining Of Cap, Post, And Segment

HB991968
Timber Lining, Showing Split Wood Puncheons Wedged Between Top Of Arch And Rock Roof Of Tunnel, Looking East

HB991969
Detail Showing Timber Arch, Lagging, And Puncheons, Looking East

HB991970
Detail Showing Timber And Joint Between Two Segments

HB991971
General Interior, Showing Timber Lining, Looking East

HB991972
Interior Wall, Looking Southeast

HB991973
Interior Wall, Looking Northeast

HB991974
Eastern Portal, Showing Hillside And Approach, Looking West

HB991975
Eastern Portal, Looking West

HB991976
South Wall Near Eastern Portal, Looking Southwest

HB991977
North Wall Near Eastern Portal, Looking Northwest


Data Pages


Photo Caption Pages


Item Title


Location
Willamette Meridian, Chapman vicinity, OR

Find maps of Chapman, OR


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER OR-3
Building/structure dates: 1910 initial construction
Building/structure dates: 1913 subsequent work
Building/structure dates: 1919 subsequent work
Building/structure dates: 1921 subsequent work
Building/structure dates: 1943 subsequent work
Significance: 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.

Subjects
Civil Engineering
Railroad Tunnels
Transportation


Related Names
Portland & Southwestern Railroad
Porter Brothers Construction Company
Chapman, Simcoe
Chapman, Fred
Champan Timber Company
Turrish, Henry
Liebertz, Tom, Photographer
Worthington, Susan, Historian


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. WESTERN PORTAL SHOWING HILLSIDE AND APPROACH, LOOKING EAST
2. WESTERN PORTAL, LOOKING EAST
3. WESTERN PORTAL AND APPROACH, LOOKING SOUTHEAST
4. WESTERN PORTAL AND APPROACH, LOOKING NORTHEAST
5. NORTH WALL OF WESTERN END, LOOKING NORTH
6. DETAIL SHOWING METHOD OF SPLICING CAPS AND SILLS
7. DETAIL SHOWING JOINING OF CAP, POST, AND SEGMENT
8. TIMBER LINING, SHOWING SPLIT WOOD PUNCHEONS WEDGED BETWEEN TOP OF ARCH AND ROCK ROOF OF TUNNEL, LOOKING EAST
9. DETAIL SHOWING TIMBER ARCH, LAGGING, AND PUNCHEONS, LOOKING EAST
10. DETAIL SHOWING TIMBER AND JOINT BETWEEN TWO SEGMENTS
11. GENERAL INTERIOR, SHOWING TIMBER LINING, LOOKING EAST
12. INTERIOR WALL, LOOKING SOUTHEAST
13. INTERIOR WALL, LOOKING NORTHEAST
14. EASTERN PORTAL, SHOWING HILLSIDE AND APPROACH, LOOKING WEST
15. EASTERN PORTAL, LOOKING WEST
16. SOUTH WALL NEAR EASTERN PORTAL, LOOKING SOUTHWEST
17. NORTH WALL NEAR EASTERN PORTAL, LOOKING NORTHWEST


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