I-405 (HWY 061) CO over HWY 61 NB TO HWY 1 NB


+45.50560, -122.67864
45°30'20" N, 122°40'43" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I-405 (HWY 061) CO over HWY 61 NB TO HWY 1 NB
Structure number:08958H061 00388
Purpose:Carries highway overpass over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:227.0 ft. [69.2 m]
Total length:1040.1 ft. [317.0 m]
Roadway width between curbs:40.0 ft. [12.2 m]
Deck width edge-to-edge:43.6 ft. [13.3 m]
Vertical clearance above deck:18.0 ft. [5.5 m]
Vertical clearance below bridge:15.7 ft. [4.8 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:6
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:55,100 [as of 2010]
Truck traffic:11% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
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:82.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
March 201482.0Not deficientSatisfactorySatisfactoryGood55100
March 201282.0Not deficientSatisfactorySatisfactoryGood55100
June 200990.1Not deficientSatisfactorySatisfactoryGood33817
June 200790.2Not deficientSatisfactorySatisfactoryGood33482
December 200590.4Not deficientSatisfactoryGoodGood32507
December 200390.4Not deficientSatisfactorySatisfactorySatisfactory32507
December 200190.6Not deficientSatisfactoryGoodGood31560
December 199993.4Not deficientSatisfactoryGoodGood19801
20000.0Not applicable---111500
December 199793.4Not deficientGoodGoodGood19800
December 199593.5Not deficientGoodGoodGood19800
December 199393.5Not deficientSatisfactoryGoodGood19800
December 199193.5Not deficientGoodVery GoodGood19800