+47.59584, -122.31723
47°35'45" N, 122°19'02" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:12 AVE S over DEARBORN ST
Structure number:085042000000000
Location:12th Ave S & Dearborn St
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:170.9 ft. [52.1 m]
Total length:495.1 ft. [150.9 m]
Roadway width between curbs:42.0 ft. [12.8 m]
Deck width edge-to-edge:65.0 ft. [19.8 m]
Vertical clearance below bridge:55.1 ft. [16.8 m]
Owner:City or Municipal Highway Agency [04]
Year built:1917
Historic significance:Bridge is on the National Register of Historic Places [1]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Truss - Deck [09]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: May 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:17,800 [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:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Operating rating:43.6 tons [39.6 metric tons]
Inventory rating:26.7 tons [24.3 metric tons]
Sufficiency rating:68.1
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$29,640,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
May 201668.1FairSatisfactorySatisfactorySatisfactoryFO17800
May 201468.9FairSatisfactorySatisfactorySatisfactoryFO11500
July 201267.0FairGoodSatisfactoryGoodFO25700
July 201167.0FairSatisfactorySatisfactoryGoodFO25700
May 201055.2FairSatisfactoryFairGoodFO25700
August 200763.7FairSatisfactoryFairSatisfactoryFO22800
August 200666.7FairSatisfactoryFairGoodFO22800
October 200463.7FairSatisfactoryFairGoodFO22800
May 200375.5FairSatisfactoryGoodGoodFO21100
January 200375.5FairSatisfactoryGoodGoodFO21100
August 200075.5FairSatisfactoryGoodGoodFO21000
March 199875.5FairSatisfactoryGoodGoodFO21000
February 199775.5FairSatisfactoryGoodGoodFO21000
February 199576.0FairSatisfactoryGoodGoodFO21000
April 199476.0FairSatisfactoryGoodGoodFO21000
November 199276.0FairSatisfactoryGoodGoodFO21000
April 199176.4FairSatisfactoryGoodGoodFO16300