Structure 820C1380001 · Sullivan County, TN

Nfa C138 over Clark Branch

Carries Nfa C138 over Clark Branch, N Of 11w Just E Of Kingsp.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 26 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built196066 years old
Length26.2 ft8 m
Daily traffic440counted 2020
Last inspectedJanuary 2024every 24 months

Location

StateTennessee
CountySullivan
LocationN Of 11w Just E Of Kingsp
CarriesNfa C138
CrossesClark Branch
Coordinates36.56583, -82.49277

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length26.2 ft (8 m)
Max Span12.1 ft (3.7 m)
Deck Width48.6 ft (14.8 m)
Deck Area118.4 sq m
Main Spans2
Year Built1960

Traffic

Avg Daily Traffic440 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number820C1380001

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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