I40 over I40 / 21ST. STREET


+35.96250, -83.94278
35°57'45" N, 83°56'34" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I40 over I40 / 21ST. STREET
Structure number:47I00400051
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:63.7 ft. [19.4 m]
Total length:142.4 ft. [43.4 m]
Roadway width between curbs:129.9 ft. [39.6 m]
Deck width edge-to-edge:131.9 ft. [40.2 m]
Vertical clearance below bridge:18.0 ft. [5.5 m]
Owner:State Highway Agency [01]
Year built:1965
Year reconstructed:1981
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:3
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: November 2014 

Status:Open, no restriction [A]
Average daily traffic:144,580 [as of 2014]
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:Superior to present desirable criteria [9]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:55.4 tons [50.4 metric tons]
Inventory rating:30.7 tons [27.9 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:75.9
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$3,799,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
November 201475.9Functionally obsoleteSatisfactoryGoodGood144580
November 201264.9Functionally obsoleteSatisfactoryGoodFair131940
November 201064.9Functionally obsoleteSatisfactoryGoodFair127990
January 200962.9Functionally obsoleteSatisfactoryGoodFair127590
October 200664.9Functionally obsoleteSatisfactoryGoodFair114820
November 200464.9Functionally obsoleteSatisfactoryGoodFair105740
November 200274.9Functionally obsoleteFairGoodSatisfactory112650
November 200074.9Functionally obsoleteFairGoodSatisfactory108940
October 199874.9Functionally obsoleteFairGoodSatisfactory126720
November 199680.0Functionally obsoleteFairGoodSatisfactory104280
December 199481.0Functionally obsoleteSatisfactoryGoodSatisfactory76100
October 199281.0Functionally obsoleteGoodGoodGood89000
October 199081.0Functionally obsoleteGoodGoodGood89000