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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 2015 

Status:Posted for load [P]
Average daily traffic:23,900 [as of 2010]
Truck traffic:14% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 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]
Evaluation:Functionally obsolete [2]
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. ratingEvaluationDeckSuper.Sub.ADT
January 201536.4Functionally obsoleteSatisfactorySatisfactoryFair23900
January 201336.4Functionally obsoleteSatisfactorySatisfactoryFair23900
December 201136.4Functionally obsoleteSatisfactorySatisfactoryFair23900
July 200939.5Functionally obsoleteSatisfactorySatisfactoryFair9900
July 200837.9Functionally obsoleteSatisfactorySatisfactoryFair11211
July 20077.0Structurally deficientSatisfactorySatisfactorySerious12400
November 200549.7Functionally obsoleteSatisfactorySatisfactorySatisfactory12400
November 200350.3Functionally obsoleteSatisfactorySatisfactorySatisfactory11500
December 200250.3Functionally obsoleteSatisfactoryGoodGood11500
November 200150.7Functionally obsoleteGoodGoodGood11100
November 199950.7Functionally obsoleteGoodGoodGood11100
November 199753.5Functionally obsoleteGoodVery GoodGood10300
November 199547.4Functionally obsoleteGoodVery GoodGood17000
November 199348.9Functionally obsoleteGoodVery GoodGood17000
November 199148.9Functionally obsoleteSatisfactoryVery GoodSatisfactory17000