12TH AVE S over I-90


+47.59475, -122.31716
47°35'41" N, 122°19'02" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:12TH AVE S over I-90
Structure number:0008155F0000000
Location:0.2 E JCT I-5
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:126.0 ft. [38.4 m]
Total length:366.2 ft. [111.6 m]
Roadway width between curbs:44.0 ft. [13.4 m]
Deck width edge-to-edge:65.0 ft. [19.8 m]
Vertical clearance below bridge:20.0 ft. [6.1 m]
Owner:State Highway Agency [01]
Year built:1968
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Number of main spans:4
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: March 2016 

Status:Open, no restriction [A]
Average daily traffic:18,400 [as of 2012]
Truck traffic:1% 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:Basically intolerable requiring high priority of replacement [2]
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:98.0 tons [89.1 metric tons]
Inventory rating:86.1 tons [78.3 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:70.3

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
March 201670.3Functionally obsoleteSatisfactorySatisfactorySatisfactory18400
March 201470.3Functionally obsoleteSatisfactorySatisfactorySatisfactory18400
March 201274.6Functionally obsoleteSatisfactorySatisfactorySatisfactory4500
April 201056.0Functionally obsoleteSatisfactorySatisfactorySatisfactory4500
April 200856.0Functionally obsoleteSatisfactorySatisfactorySatisfactory4500
May 200756.0Functionally obsoleteSatisfactorySatisfactorySatisfactory4500
May 200656.0Functionally obsoleteSatisfactorySatisfactoryGood4500
December 200556.0Functionally obsoleteSatisfactoryGoodGood4500
December 200356.0Functionally obsoleteSatisfactoryGoodGood4500
August 200156.0Functionally obsoleteSatisfactoryGoodGood4500
May 199956.0Functionally obsoleteSatisfactoryGoodGood4500
20000.0Not applicable---51000
July 199155.9Functionally obsoleteSatisfactoryGoodGood4500