Shepperd's Dell Bridge
Route 2 / US 30 / Oregon 100
Built: 1914
Page Index
Robert W. Hadlow, Columbia River Highway Historic District, National Historic Landmark Nomination
CS7. Structure: Shepperd’s Dell Bridge, No. 4528 HAER No. OR-23
Location: HMP 27.4
Date: 1914
Designer: K. P. Billner, Oregon State Highway Dept.
Builder: Pacific Bridge Company, Portland
Owner: Oregon Department of Transportation
This bridge consists of a single 100-foot, open spandrel, reinforced-concrete ribbed deck arch. Total length with approaches is 150 feet. It has a 17-foot-wide roadway, two sidewalks, and spindle-and-cap railings. A staircase at the eastern end leads down to a masonry-walled pedestrian trail that takes visitors to the stream. A bronze plaque on the southeast masonry railing end post reads:
SHEPPERD’S DELL
Presented to the
City of Portland
by George Shepperd
May 6th 1915
Hadlow, Landmark Nomination, 18
"The Shepperd's Dell bridge is 135 above the stream, which is spanned with a reinforced concrete arch 100 feet in length, the total length from end to end being 150 feet."
Lancaster, 1914 62
Image Currently Unavailable
Bridge Construction Costs1st Annual Report, 1914 p. 50
BridgeHunter.com: Shepperds Dell Bridge
Overview: Concrete arch bridge over Shepperds Dell on Historical Columbia River Highway
Location: Multnomah County, Oregon
Status: Open to traffic
History: Built 1914
Builders
- Charles H. Purcell (Bridge Engineer)
- Karl P. Billner (Design Engineer)
- Pacific Bridge Co. of Portland, Oregon (Prime Contractor)
- The Construction Co. (Sub-Contractor)
Design: Open-spandrel concrete arch
Dimensions
Length of largest span: 100.0 ft.
Total length: 149.9 ft.
Deck width: 16.9 ft.
Also called: Youngs Creek Bridge
Average daily traffic (as of 2016): 1,300
Inventory numbers
OR 04528 (Oregon Dept. of Transportation structure number)
BH 30115 (Bridgehunter.com ID)
BridgeHunter.com: Shepperds Dell Bridgehttps://bridgehunter.com/or/multnomah/452812501498/
BridgeReports.com: HWY 100 over SHEPPERDS DELL
Latest Available Inspection: September 2017
Good/Fair/Poor Condition: Fair
Status: Open, no restriction [A]
Average daily traffic: 1,300 [as of 2016]
Truck traffic: 3% of total traffic
Deck condition: Satisfactory [6 out of 9]
Superstructure condition: Fair [5 out of 9]
Substructure condition: Satisfactory [6 out of 9]
Structural appraisal: Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal: Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal: Equal to present desirable criteria [8]
Roadway alignment appraisal: Equal to present minimum criteria [6]
Channel protection: Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Pier/abutment protection: Navigation protection not required [1]
Scour condition: Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating: 30.8
Recommended work: Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work: $769,000
BridgeReports.com: HWY 100 over SHEPPERDS DELL https://bridgereports.com/1448762 Accessed: April 20, 2020
Photo Currently Unavailable
Shepperd's Dell and BridgeLipschuetz and Katz. Oregon's Famous Columbia River Highway. Portland: Lipschuetz and Katz. 1920. University of California Libraries(https://archive.org/details/oregonsfamouscol00lips)Links
Library of Congress: Historic American Buildings Survey, Engineering Record, Landscapes Survey
Shepperds Dell Bridge, Spanning Young Creek at Columbia River Highway, Latourell, Multnomah County, OR