I124 NBL over W.12TH ST (NFA 410)


+35.04167, -85.31668
35°02'30" N, 85°19'00" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I124 NBL over W.12TH ST (NFA 410)
Structure number:33I01240011
Location:4.2 MI S OF TN RIVER
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:64.0 ft. [19.5 m]
Total length:148.0 ft. [45.1 m]
Roadway width between curbs:39.0 ft. [11.9 m]
Deck width edge-to-edge:50.2 ft. [15.3 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1963
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 18 / HS 20 [5]
Number of main spans:3
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: August 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:72,110 [as of 2015]
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:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:70.3
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]
Estimated cost of work:$421,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2016FairFairSatisfactorySatisfactory7211070.3
August 2014FairFairSatisfactorySatisfactory6953070.4
August 2012FairFairSatisfactoryFair7960058.8
August 2010PoorPoorSatisfactoryFair8101058.8
September 2008PoorPoorSatisfactoryFair7865059.0
August 2006PoorPoorSatisfactoryFair6880059.7
September 2004PoorPoorSatisfactoryFair6958059.7
September 2002PoorPoorSatisfactoryFair6922059.7
October 2000PoorPoorSatisfactoryFair6047060.4
October 1998FairFairSatisfactoryFair6263062.4
August 1996FairSatisfactoryGoodSatisfactory6800067.8
January 1995FairSatisfactoryGoodSatisfactory6284069.9
December 1992FairSatisfactoryGoodSatisfactory3835072.3
February 1991FairSatisfactoryGoodSatisfactory3835072.3

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
Steel Girder/Beamlinear ft.888704170140
Reinforced Concrete Decksq. ft.5,3285,328000
Reinforced Concrete Columneach60060
Reinforced Concrete Abutmentlinear ft.72601110
Reinforced Concrete Pier Caplinear ft.72620100
Movable Bearingeach1810800
Fixed Bearingeach1818000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.296288080