Structure 95I00400023 · Wilson County, TN

Nfa 5520 (sa 9508) over Nfa 5520 / I40

Carries Nfa 5520 (sa 9508) over Nfa 5520 / I40, Overhead/i40.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT247 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

247 ft end to end, longest span 70 ft: about 3 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 tee-beam bridge.

Built196363 years old
Length247.0 ft75.3 m
Daily traffic2,743counted 2021
Last inspectedOctober 2023every 24 months

Location

StateTennessee
CountyWilson
LocationOverhead/i40
CarriesNfa 5520 (sa 9508)
CrossesNfa 5520 / I40
Coordinates36.18235, -86.30648

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length247.0 ft (75.3 m)
Max Span69.9 ft (21.3 m)
Deck Width34.4 ft (10.5 m)
Deck Area790.6 sq m
Main Spans4
Year Built1963

Traffic

Avg Daily Traffic2,743 (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 Number95I00400023

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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