+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 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:300 [as of 2017]
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:48.1 tons [43.7 metric tons]
Inventory rating:37.1 tons [33.7 metric tons]
Sufficiency rating:95.9

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
January 201795.9FairSatisfactoryGoodGood-300
January 201595.9FairSatisfactoryGoodGood-300
January 201395.9FairSatisfactoryGoodGood-300
January 201195.9FairSatisfactoryGoodGood-300
January 200995.9FairSatisfactoryGoodGood-300
December 200698.9FairSatisfactoryGoodGood-300
November 200499.9FairSatisfactoryGoodGood-300
October 200299.9FairSatisfactoryGoodGood-300
January 200197.9FairSatisfactoryGoodGood-300
December 199899.9FairSatisfactoryGoodGood-300
January 199799.9FairSatisfactoryGoodGood-300
January 199599.9FairSatisfactoryGoodGood-300
December 199299.9GoodGoodGoodGood-300
November 199099.9GoodGoodGoodGood-300