+47.59583, -122.31722
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:52.5 ft. [16.0 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 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:22,250 [as of 2016]
Truck traffic:5% of total traffic
Deck condition:Fair [5 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]
Sufficiency rating:68.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$29,640,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2018FairFairSatisfactorySatisfactory2225068.0
May 2016FairSatisfactorySatisfactorySatisfactory1780068.1
May 2014FairSatisfactorySatisfactorySatisfactory1150068.9
July 2012FairGoodSatisfactoryGood2570067.0
July 2011FairSatisfactorySatisfactoryGood2570067.0
May 2010FairSatisfactoryFairGood2570055.2
August 2007FairSatisfactoryFairSatisfactory2280063.7
August 2006FairSatisfactoryFairGood2280066.7
October 2004FairSatisfactoryFairGood2280063.7
May 2003FairSatisfactoryGoodGood2110075.5
January 2003FairSatisfactoryGoodGood2110075.5
August 2000FairSatisfactoryGoodGood2100075.5
March 1998FairSatisfactoryGoodGood2100075.5
February 1997FairSatisfactoryGoodGood2100075.5
February 1995FairSatisfactoryGoodGood2100076.0
April 1994FairSatisfactoryGoodGood2100076.0
November 1992FairSatisfactoryGoodGood2100076.0
April 1991FairSatisfactoryGoodGood1630076.4