Structure 5570001P0000000 · Lewis County, TN

Natchez Trace Park over Tn State Park Road

Carries Natchez Trace Park over Tn State Park Road, 2.9 Miles From Tn Route 9.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure7/9 · Good
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 7/9

106 ft end to end, longest span 42 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 slab bridge.

Built1968rebuilt 1984
Length105.6 ft32.2 m
Daily traffic460counted 2024
Last inspectedMarch 2023every 24 months

Location

StateTennessee
CountyLewis
Location2.9 Miles From Tn Route 9
CarriesNatchez Trace Park
CrossesTn State Park Road
Coordinates35.60628, -87.40406

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length105.6 ft (32.2 m)
Max Span41.7 ft (12.7 m)
Deck Width32.5 ft (9.9 m)
Deck Area318.8 sq m
Main Spans3
Year Built1968 (reconstructed 1984)

Traffic

Avg Daily Traffic460 (2024)
Truck Traffic2%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerNational Park Service
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number5570001P0000000

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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