+45.50929, -122.66711
45°30'33" N, 122°40'02" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-5 (HWY 001) SB over MARQUAM RAMP SB
Structure number:08591C001 30010
Purpose:Carries highway overpass (third level) over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:189.6 ft. [57.8 m]
Total length:1898.4 ft. [578.6 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:16.1 ft. [4.9 m]
Vertical clearance below bridge:16.1 ft. [4.9 m]
Owner:State Highway Agency [01]
Year built:1966
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:14
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:137,300 [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:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Basically intolerable requiring high priority of replacement [2]
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]
Evaluation:Functionally obsolete [2]
Sufficiency rating:79.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$12,989,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
July 201579.0Functionally obsoleteSatisfactorySatisfactorySatisfactory137300
July 201379.0Functionally obsoleteSatisfactorySatisfactorySatisfactory64236
June 201052.0Structurally deficientGoodPoorSatisfactory64236
January 201052.0Structurally deficientGoodPoorSatisfactory64236
January 200852.0Structurally deficientGoodPoorSatisfactory63600
January 200668.0Functionally obsoleteGoodSatisfactoryFair61550
January 200468.0Functionally obsoleteGoodSatisfactoryFair39665
January 200279.0Functionally obsoleteGoodGoodGood38510
January 200079.0Functionally obsoleteGoodGoodGood37100
20000.0Not applicable---46500
January 199879.0Functionally obsoleteGoodGoodGood60900
January 199679.7Functionally obsoleteGoodGoodGood25500
January 199479.7Functionally obsoleteGoodGoodGood25500
January 199279.7Functionally obsoleteGoodGoodGood25500