+36.00389, -83.78806
36°00'14" N, 83°47'17" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:NFA D670 over UNION SCHOOL ROAD / I40
Structure number:47I00400103
Location:1.4 M NW OF SR9
Purpose:Carries highway over highway
Route classification:Local (Rural) [09]
Length of largest span:125.0 ft. [38.1 m]
Total length:250.0 ft. [76.2 m]
Roadway width between curbs:29.9 ft. [9.1 m]
Deck width edge-to-edge:32.2 ft. [9.8 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1975
Historic significance:Historical significance is not determinable at this time [4]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Concrete continuous [2]
Main spans design:Box beam or girders - Multiple [05]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: January 2015 

Status:Open, no restriction [A]
Average daily traffic:300 [as of 2015]
Truck traffic:2% 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:Equal to present minimum criteria [6]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:98.0 tons [89.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:95.9

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
January 201595.9Not deficientSatisfactoryGoodGood300
January 201395.9Not deficientSatisfactoryGoodGood300
January 201195.9Not deficientSatisfactoryGoodGood300
January 200995.9Not deficientSatisfactoryGoodGood300
December 200698.9Not deficientSatisfactoryGoodGood300
November 200499.9Not deficientSatisfactoryGoodGood300
October 200299.9Not deficientSatisfactoryGoodGood300
January 200197.9Not deficientSatisfactoryGoodGood300
December 199899.9Not deficientSatisfactoryGoodGood300
January 199799.9Not deficientSatisfactoryGoodGood300
January 199599.9Not deficientSatisfactoryGoodGood300
December 199299.9Not deficientGoodGoodGood300
November 199099.9Not deficientGoodGoodGood300