018.110 Route 2: East Viaduct - Multnomah

East Multnomah Viaduct
1st Annual Report, 1914. 61

CS14. Structure: East Multnomah Falls Viaduct, No. 841 HAER No. OR-36-J
Location: HMP 32.3 
Date: 1914
Designer: K. P. Billner, Oregon State Highway Dept.
Builder: Pacific Bridge Company, Portland
Owner: Oregon Department of Transportation

This 860-foot viaduct originally consisted of forty-three 20-foot reinforced-concrete slab spans.
The deck was supported by two parallel rows of 16-foot-square columns, 17'-6" apart. Roadway
width is about 18 feet. 

To provide greater stability to the structure, the Oregon State Highway
Department, in 1922, added sets of intermediate posts and transverse walls at the midpoint of
each span. Like the West Multnomah Falls Viaduct, this structure rises up the hillside because of
tight right-of-way clearances with the nearby railroad mainline, and has a concrete retaining wall
running along its south elevation. The arched railings were constructed of plaster concrete and
metal lath. They represent a member of the family of bridge railing designs found on the CRH.

Hadlow, Landmark Nomination, 20

Eastbound onto the Eastern Viaduct (2015)
Historic Columbia River Highway. Oregon. January 9, 2015
Copyright © 2015 A. F. Litt, All Rights Reserved

Just east of Multnomah Falls it was necessary to construct a similar viaduct 860 feet in length, the greatest height being 22 feet above the railway track, where the slopes of the mountain were very steep.  (Lancaster, 1914 65)

Post Card (Original): 9. Columbia River Highway Ore, # 251
"This is an unused vintage Real Photo Post Card produced by early 20th Century photographers, Cross & Dimmit. The image was taken circa 1918. Photo post cards of this type were made between 1918 and 1940. As this post card is approximately 70 to 90 years old, minor imperfections and condition issues may be present." Friends of Vista House. From the collection of A. F. Litt.

Bridge Construction Costs
1st Annual Report, 1914 p. 50
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Viaduct Near Multnomah Falls - Display at Vista House
Vista House. Crown Point State Park. August 20, 2013

Retaining Wall, East Multnomah Viaduct
Davison, Danae, Barbara Knapp. Cultural Landscape Inventory: Shellrock Mountain to Ruthton Point - Historic Columbia River Highway. Oregon Department of Transportation. January 2010. (31)
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