OR 18-HWY 483 over South Yamhill River


+45.20559, -123.18224
45°12'20" N, 123°10'56" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:OR 18-HWY 483 over South Yamhill River
Structure number:06758 039Y04675
Location:060 MI SW HWY 1W JCT
Purpose:Carries highway over waterway
Route classification:Principal Arterial - Other (Rural) [02]
Length of largest span:120.1 ft. [36.6 m]
Total length:990.2 ft. [301.8 m]
Roadway width between curbs:25.9 ft. [7.9 m]
Deck width edge-to-edge:35.1 ft. [10.7 m]
Owner:State Highway Agency [01]
Year built:1951
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 13.5 / HS 15 [3]
Main span material:Steel [3]
Main span design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:16,200 [as of 2017]
Truck traffic:3% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Serious [3 out of 9]
Structural appraisal:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge is scour critical; bridge foundations determined to be unstable. [3]
Sufficiency rating:60.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$5,579,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018PoorFairSatisfactorySerious1620060.0
June 2017PoorFairSatisfactorySerious150006.0
June 2016PoorFairSatisfactorySerious152006.0
June 2015PoorFairSatisfactorySerious152006.0
June 2014PoorFairSatisfactorySerious146686.0
June 2013PoorFairSatisfactoryPoor1466829.3
June 2011PoorSatisfactorySatisfactoryPoor1466830.7
June 2010PoorSatisfactorySatisfactoryPoor1466830.7
June 2009PoorSatisfactorySatisfactoryPoor1466823.2
June 2008PoorSatisfactorySatisfactoryPoor1466835.7
June 2007PoorSatisfactorySatisfactoryPoor1410036.2
June 2005PoorSatisfactorySatisfactoryPoor1410036.2
June 2004FairSatisfactorySatisfactoryFair1410054.4
October 2003PoorPoorFairSerious1390011.5
September 2002PoorFairFairPoor1390034.6
September 2001PoorFairFairPoor1360034.8
September 2000PoorFairFairPoor1330035.1
September 1999PoorFairSatisfactoryPoor1330035.1
September 1998PoorSatisfactorySatisfactoryPoor1330036.4
September 1997PoorSatisfactorySatisfactoryPoor1090018.1
September 1996PoorSatisfactorySatisfactoryPoor1090038.2
September 1995FairSatisfactorySatisfactoryFair1090056.6
September 1994FairSatisfactorySatisfactoryFair1090056.6
December 1992FairSatisfactorySatisfactoryFair1090056.6
September 1991FairSatisfactorySatisfactoryFair1090056.6

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.244024220
Steel Protective Coatingsq. ft.5,21004,610400200
Reinforced Concrete Girder/Beamlinear ft.5,22005,21910
Steel Stringerlinear ft.2441846000
Steel Protective Coatingsq. ft.1,0440984600
Reinforced Concrete Decksq. ft.34,89822,87256111,4650
Wearing Surfacessq. ft.13,0366,4422,7701,8941,930
Steel Floor Beamlinear ft.1616010100
Steel Protective Coatingsq. ft.1,40001,1882120
Steel Columneach44000
Steel Protective Coatingsq. ft.104010400
Reinforced Concrete Columneach1201200
Timber Abutmentlinear ft.70402280
Steel Pileeach8508500
Timber Pileeach1191962317
Steel Pier Caplinear ft.3870377100
Reinforced Concrete Pier Caplinear ft.141138120
Timber Pier Caplinear ft.543184313460
Other Jointlinear ft.1930943366
Movable Bearingeach3803080
Steel Protective Coatingsq. ft.721832220
Fixed Bearingeach20200
Steel Protective Coatingsq. ft.32001616
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.1,9942691,72500
Steel Protective Coatingsq. ft.5,94003,5641,782594