Structure 100C1010001 · Carter County, TN

Nfa A373 over Doe River

Carries Nfa A373 over Doe River, E Of Sr143 Near Roan Mtn.

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
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT68 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

68 ft end to end, longest span 23 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.

Built194680 years old
Length67.6 ft20.6 m
Daily traffic270counted 2020
Last inspectedJuly 2023every 24 months

Location

StateTennessee
CountyCarter
LocationE Of Sr143 Near Roan Mtn
CarriesNfa A373
CrossesDoe River
Coordinates36.18660, -82.07169

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length67.6 ft (20.6 m)
Max Span23.0 ft (7 m)
Deck Width12.5 ft (3.8 m)
Deck Area78.3 sq m
Main Spans3
Year Built1946

Traffic

Avg Daily Traffic270 (2020)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100C1010001

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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