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HWY 120 over COLUMBIA SLOUGH

Map

Coordinates:
+45.60041, -122.71951
45°36'01" N, 122°43'10" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts

Name:HWY 120 over COLUMBIA SLOUGH
Structure number:01726 120 00038
Location:5.5 MI NW PORTLAND CC
Purpose:Carries highway over waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:85.0 ft. [25.9 m]
Total length:337.9 ft. [103.0 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:33.8 ft. [10.3 m]
Owner:State Highway Agency [01]
Year built:1933
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: January 2017

Good/Fair/Poor Condition:Fair
Status:Posted for load [P]
Average daily traffic:31,400 [as of 2014]
Truck traffic:20% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
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: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]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:32.9 tons [29.9 metric tons]
Inventory rating:19.9 tons [18.1 metric tons]
Sufficiency rating:36.4
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$1,732,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
January 201736.4FairSatisfactoryFairFairFO31400
January 201536.4FairSatisfactorySatisfactoryFairFO23900
January 201336.4FairSatisfactorySatisfactoryFairFO23900
December 201136.4FairSatisfactorySatisfactoryFairFO23900
July 200939.5FairSatisfactorySatisfactoryFairFO9900
July 200837.9FairSatisfactorySatisfactoryFairFO11211
July 20077.0PoorSatisfactorySatisfactorySeriousSD12400
November 200549.7FairSatisfactorySatisfactorySatisfactoryFO12400
November 200350.3FairSatisfactorySatisfactorySatisfactoryFO11500
December 200250.3FairSatisfactoryGoodGoodFO11500
November 200150.7GoodGoodGoodGoodFO11100
November 199950.7GoodGoodGoodGoodFO11100
November 199753.5GoodGoodVery GoodGoodFO10300
November 199547.4GoodGoodVery GoodGoodFO17000
November 199348.9GoodGoodVery GoodGoodFO17000
November 199148.9FairSatisfactoryVery GoodSatisfactoryFO17000