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


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