I-405 (HWY 061)CON over 61 NB CONN TO HWY 1 SB


+45.54328, -122.67644
45°32'36" N, 122°40'35" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-405 (HWY 061)CON over 61 NB CONN TO HWY 1 SB
Structure number:08958D061 00352
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:160.1 ft. [48.8 m]
Total length:1578.2 ft. [481.0 m]
Roadway width between curbs:25.9 ft. [7.9 m]
Deck width edge-to-edge:29.5 ft. [9.0 m]
Vertical clearance above deck:18.0 ft. [5.5 m]
Owner:State Highway Agency [01]
Year built:1973
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:7
Main spans material:Steel continuous [4]
Main spans design:Box beam or girders - Multiple [05]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: March 2014 

Status:Open, no restriction [A]
Average daily traffic:14,800 [as of 2010]
Truck traffic:10% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Equal to present desirable criteria [8]
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:91.1

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
March 201491.1Not deficientSatisfactoryGoodGood14800
March 201291.1Not deficientSatisfactoryGoodGood14800
June 200990.9Not deficientSatisfactoryGoodGood15130
June 200791.0Not deficientSatisfactoryGoodGood14980
December 200591.2Not deficientSatisfactoryGoodGood14544
December 200379.2Not deficientSatisfactoryFairSatisfactory14544
December 200191.4Not deficientGoodGoodGood14120
December 199992.9Not deficientVery GoodGoodGood10801
December 199792.9Not deficientVery GoodGoodGood10800
December 199593.1Not deficientVery GoodGoodGood10800
December 199393.1Not deficientGoodGoodGood10800
December 199193.1Not deficientGoodGoodGood10800