Structure 24I00400016 · Fayette County, TN

I40 over Porter Rd.

Carries I40 over Porter Rd., 2 M SW Jct I40&sr59.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

106 ft end to end, longest span 36 ft. 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 multi-beam bridge.

Built196363 years old
Length105.6 ft32.2 m
Daily traffic38,372counted 2021
Last inspectedAugust 2024every 24 months

Location

StateTennessee
CountyFayette
Location2 M SW Jct I40&sr59
CarriesI40
CrossesPorter Rd.
Coordinates35.33622, -89.54964

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length105.6 ft (32.2 m)
Max Span35.8 ft (10.9 m)
Deck Width44.6 ft (13.6 m)
Deck Area437.9 sq m
Main Spans3
Year Built1963

Traffic

Avg Daily Traffic38,372 (2021)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number24I00400016

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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