Whiteson Dip Bridge
Whiteson Dip Bridge
Side elevation - from the southeast.
Photo taken by Mike Goff in March 2018
BH Photo #444071
The Whiteson Dip Bridge is a unique structure in the sense that in the design it both marks the end of one bridge building era and the beginning of another.
Being built in 1956 with a large timber trestle substructure, the bridge was a relatively late use of timber construction on a major highway route. The center portion of the structure features a framed timber trestle that measures over 40-feet tall. The timber trestle design made for a inexpensive structure to cross the nearly 300-foot wide ravine over the Whiteson Dip.
The concrete superstructure on the bridge while standard for the era, also marked an important step in engineering advancements. The girders were pre-cast and then placed on the substructure. Once the girders were placed the deck and rails could be constructed. This method of construction was a precursor to the Interstate Era that would dawn shortly after the Whiteson Dip Bridge was completed.
- Concrete deck girder bridge over Whiteson Dip on OR-99W
- Yamhill County, Oregon
- Open to traffic
- Built 1956
- Concrete deck girder supported by timber trestle
Length of largest span: 24.9 ft.
Total length: 274.9 ft.
Deck width: 29.9 ft.
- Approximate latitude, longitude
- +45.14947, -123.19740 (decimal degrees)
45°08'58" N, 123°11'51" W (degrees°minutes'seconds")
- Approximate UTM coordinates
- 10/484482/4999574 (zone/easting/northing)
- Average daily traffic (as of 2014)
- Inventory numbers
- OR 08208 (Oregon Dept. of Transportation structure number)
BH 84567 (Bridgehunter.com ID)
- Inspection report (as of March 2016)
- Overall condition: Poor
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Poor (4 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 52.4 (out of 100)
View more at BridgeReports.com
- April 4, 2019: New photos from Mike Goff
- February 27, 2019: New photos from Mike Goff
- Mike Goff - michael [dot] goff [at] hotmail [dot] com