Structure 460A0510001 · Johnson County, TN

Nfa A051 over Doe Creek

Carries Nfa A051 over Doe Creek, S Off Sr167-.8 M E Of 67.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

52 ft end to end, longest span 26 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 box-beam bridge.

Built198442 years old
Length51.8 ft15.8 m
Daily traffic20counted 2020
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyJohnson
LocationS Off Sr167-.8 M E Of 67
CarriesNfa A051
CrossesDoe Creek
Coordinates36.38324, -81.96110

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length51.8 ft (15.8 m)
Max Span25.9 ft (7.9 m)
Deck Width25.9 ft (7.9 m)
Deck Area124.8 sq m
Main Spans2
Year Built1984

Traffic

Avg Daily Traffic20 (2020)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number460A0510001

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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