Structure 95I00400047 · Wilson County, TN

Nfa 1486 over Nfa 1486 / I40

Carries Nfa 1486 over Nfa 1486 / I40, Overhead Over I40.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT321 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 7/9

321 ft end to end, longest span 93 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built196264 years old
Length320.9 ft97.8 m
Daily traffic288counted 2021
Last inspectedOctober 2023every 24 months

Location

StateTennessee
CountyWilson
LocationOverhead Over I40
CarriesNfa 1486
CrossesNfa 1486 / I40
Coordinates36.16945, -86.11343

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length320.9 ft (97.8 m)
Max Span92.8 ft (28.3 m)
Deck Width28.5 ft (8.7 m)
Deck Area850.9 sq m
Main Spans4
Year Built1962

Traffic

Avg Daily Traffic288 (2021)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number95I00400047

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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