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


+35.04167, -85.31667
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:18.7 ft. [5.7 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 2014 

Status:Open, no restriction [A]
Average daily traffic:69,530 [as of 2014]
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]
Operating rating:57.4 tons [52.2 metric tons]
Inventory rating:34.7 tons [31.5 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:70.4
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]
Estimated cost of work:$421,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
August 201470.4Functionally obsoleteFairSatisfactorySatisfactory69530
August 201258.8Functionally obsoleteFairSatisfactoryFair79600
August 201058.8Structurally deficientPoorSatisfactoryFair81010
September 200859.0Structurally deficientPoorSatisfactoryFair78650
August 200659.7Structurally deficientPoorSatisfactoryFair68800
September 200459.7Structurally deficientPoorSatisfactoryFair69580
September 200259.7Structurally deficientPoorSatisfactoryFair69220
October 200060.4Structurally deficientPoorSatisfactoryFair60470
October 199862.4Functionally obsoleteFairSatisfactoryFair62630
August 199667.8Functionally obsoleteSatisfactoryGoodSatisfactory68000
January 199569.9Functionally obsoleteSatisfactoryGoodSatisfactory62840
December 199272.3Functionally obsoleteSatisfactoryGoodSatisfactory38350
February 199172.3Functionally obsoleteSatisfactoryGoodSatisfactory38350