Share:

I-405 (HWY 061) over CONN'S 1 & 2

Map

Coordinates:
+45.50456, -122.67441
45°30'16" N, 122°40'28" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I-405 (HWY 061) over CONN'S 1 & 2
Structure number:08591F061 00048
Location:W MARQUAM INTERCHANGE
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:186.0 ft. [56.7 m]
Total length:1140.1 ft. [347.5 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:18.7 ft. [5.7 m]
Vertical clearance below bridge:16.4 ft. [5.0 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:3
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: July 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:87,100 [as of 2014]
Truck traffic:5% 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:Basically intolerable requiring high priority of corrrective action [3]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
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:21.0 tons [19.1 metric tons]
Inventory rating:16.4 tons [14.9 metric tons]
Sufficiency rating:54.4
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$7,031,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201554.4FairSatisfactorySatisfactorySatisfactoryFO87100
July 201358.2FairSatisfactorySatisfactorySatisfactoryFO24623
June 201087.5FairSatisfactorySatisfactorySatisfactory-24623
January 201087.5FairSatisfactorySatisfactorySatisfactory-24623
May 200887.5FairSatisfactorySatisfactorySatisfactory-24623
May 200687.6FairSatisfactorySatisfactorySatisfactory-23669
May 200487.6FairSatisfactorySatisfactorySatisfactory-23669
March 200287.6GoodGoodGoodGood-22980
March 200087.6GoodGoodGoodGood-22750
March 199884.6GoodGoodGoodGoodFO22750
March 199687.4GoodGoodGoodGood-19430
March 199487.4GoodGoodGoodGood-19430
March 199287.4GoodGoodGoodGood-19430
March 199087.4GoodGoodGoodGood-19400

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.1,6161,373232110
Steel Protective Coatingsq. ft.26,61523,6872,6622660
Prestressed Concrete Girder/Beamlinear ft.2,4202,419010
Reinforced Concrete Girder/Beamlinear ft.52419432460
Deck
Reinforced Concrete Decksq. ft.37,33335,8391,439550
Wearing Surfacessq. ft.32,288032,0202680
Superstructure
Steel Floor Beamlinear ft.3103100
Steel Protective Coatingsq. ft.907090700
Deck
Reinforced Concrete Top Flangesq. ft.4,8034,65315000
Wearing Surfacessq. ft.4,24004,24000
Superstructure
Steel Pin or Pin & Hangar Assemblyeach80800
Steel Protective Coatingsq. ft.92374690
Substructure
Reinforced Concrete Columneach1861200
Reinforced Concrete Abutmentlinear ft.7262910
Steel Pier Caplinear ft.3103100
Reinforced Concrete Pier Caplinear ft.39021916740
Joints
Compression Jointlinear ft.22214705520
Other Jointlinear ft.7200072
Bearings
Elastomeric Bearingeach6463100
Movable Bearingeach80800
Fixed Bearingeach60600
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.2,28002,0472330