OR 99W (HWY 91) SB over North Yamhill River


+45.23180, -123.16119
45°13'54" N, 123°09'40" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:OR 99W (HWY 91) SB over North Yamhill River
Structure number:00441 01W 03499
Purpose:Carries highway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:80.1 ft. [24.4 m]
Total length:359.9 ft. [109.7 m]
Roadway width between curbs:20.0 ft. [6.1 m]
Deck width edge-to-edge:26.6 ft. [8.1 m]
Owner:State Highway Agency [01]
Year built:1921
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:M 13.5 / H 15 [2]
Main span material:Steel [3]
Main span design:Truss - Deck [09]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: March 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:11,350 [as of 2017]
Truck traffic:7% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 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 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:41.1
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$1,844,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2018FairFairFairFair1135041.1
March 2016FairFairFairFair1890042.3
March 2014FairFairFairFair1378443.5
March 2012FairFairFairFair1378443.5
March 2010FairFairFairFair1378443.5
March 2008FairFairFairFair1378443.5
March 2006FairFairFairFair1325043.7
March 2004FairFairFairFair1295043.5
March 2002FairSatisfactorySatisfactorySatisfactory1295054.4
March 2000FairSatisfactorySatisfactorySatisfactory1175054.6
March 1998FairSatisfactorySatisfactoryGood1175055.6
March 1996FairSatisfactoryGoodVery Good2000058.5
March 1994FairSatisfactoryGoodVery Good2000058.5
May 1992GoodGoodGoodVery Good800065.6
March 1990GoodGoodGoodVery Good800063.6

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Girder/Beamlinear ft.1,120453596710
Reinforced Concrete Stringerlinear ft.803510350
Steel Trusslinear ft.1600150100
Steel Protective Coatingsq. ft.4,26402,5111,393360
Steel Floor Beamlinear ft.286124401220
Steel Protective Coatingsq. ft.9900729156105
Reinforced Concrete Floor Beamlinear ft.88000
Reinforced Concrete Top Flangesq. ft.7,4686,8721404560
Wearing Surfacessq. ft.5,6003,3602,24000
Steel Gusset Plateeach56361640
Steel Protective Coatingsq. ft.9400860782
Reinforced Concrete Columneach3324720
Reinforced Concrete Abutmentlinear ft.5353000
Reinforced Concrete Pile Cap/Footinglinear ft.2020000
Reinforced Concrete Pier Caplinear ft.1871715110
Other Jointlinear ft.1021530534
Movable Bearingeach100820
Steel Protective Coatingsq. ft.1801800
Fixed Bearingeach20200
Steel Protective Coatingsq. ft.1400140
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.7200630900
Reinforced Concrete Slabsq. ft.2,1341,930190140
Wearing Surfacessq. ft.1,60096064000