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HY 1SB TO HY 61NB over MARQ RAMP TO HWY 61 NB

Map 

Coordinates:
+45.50542, -122.67536
45°30'20" N, 122°40'31" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:HY 1SB TO HY 61NB over MARQ RAMP TO HWY 61 NB
Structure number:08591B001C30046
Location:WEST MARQUAM INTERCHANGE
Purpose:Carries highway overpass over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:178.5 ft. [54.4 m]
Total length:1607.7 ft. [490.0 m]
Roadway width between curbs:32.2 ft. [9.8 m]
Deck width edge-to-edge:37.1 ft. [11.3 m]
Vertical clearance above deck:18.4 ft. [5.6 m]
Vertical clearance below bridge:17.7 ft. [5.4 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1965
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:11
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: July 2015 

Status:Open, no restriction [A]
Average daily traffic:25,100 [as of 2014]
Truck traffic:9% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:59.8 tons [54.4 metric tons]
Inventory rating:36.0 tons [32.7 metric tons]
Sufficiency rating:87.1

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
July 201587.1Not deficientSatisfactorySatisfactorySatisfactory25100
July 201387.3Not deficientSatisfactorySatisfactorySatisfactory24623
June 201087.3Not deficientGoodSatisfactorySatisfactory24623
January 201087.3Not deficientGoodSatisfactorySatisfactory24623
January 200887.4Not deficientGoodSatisfactorySatisfactory24379
January 200687.8Not deficientGoodSatisfactorySatisfactory23669
January 200475.1Not deficientGoodFairFair23669
January 200289.2Not deficientGoodGoodGood22980
January 200089.3Not deficientGoodGoodGood22750
20000.0Not applicable---25000
January 199888.0Not deficientGoodGoodGood25500
January 199688.5Not deficientGoodGoodGood25500
January 199488.5Not deficientGoodGoodGood25500
January 199286.5Not deficientGoodGoodGood25500