US Bridges

Nfa 1392 over Branch

Fair

Carter County, Tennessee · N. of Elizabethon · Structure no. 10SR0370029

Built
1950
75 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
716
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1392 over Branch is a concrete continuous culvert carrying Nfa 1392 over Branch in Carter County, Tennessee. It was built in 1950, so it is 75 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 716 vehicles a day, roughly 3% of them trucks, projected to reach 906 by 2041. The structure is 21 ft (6.4 m) long and 23 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesNfa 1392
CrossesBranch
LocationN. of Elizabethon
RouteCounty Highway 1392
CountyCarter County
StateTennessee
Coordinates36.39806, -82.24583
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span9 ft (2.8 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic716 (2021)
Projected traffic906 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$97,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1392 over Branch built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nfa 1392 over Branch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Nfa 1392 over Branch carry?

About 716 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1392 over Branch?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.8 m) and a deck 23 ft wide.

Who owns Nfa 1392 over Branch?

It is owned by the County Highway Agency.