Structure 54I00750010 · McMinn County, TN

I75 Sbl over Nfa 1231

Carries I75 Sbl over Nfa 1231, 7.3 Mi. From Bradley Co..

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT95 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

95 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built197254 years old
Length95.1 ft29 m
Daily traffic47,306counted 2021
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyMcMinn
Location7.3 Mi. From Bradley Co.
CarriesI75 Sbl
CrossesNfa 1231
Coordinates35.39306, -84.71981

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length95.1 ft (29 m)
Max Span95.1 ft (29 m)
Deck Width44.0 ft (13.4 m)
Deck Area388.6 sq m
Main Spans1
Year Built1972

Traffic

Avg Daily Traffic47,306 (2021)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number54I00750010

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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