US Bridges

Nfa A912 over Branch

Fair

Carter County, Tennessee · NE of Elizabethton-S OF91 · Structure no. 100A9120001

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
27 ft
1 main span
Daily traffic
190
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A912 over Branch is a aluminum, wrought iron, or cast iron culvert carrying Nfa A912 over Branch in Carter County, Tennessee. It was built in 1987, so it is 38 years old, younger 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 190 vehicles a day, roughly 2% of them trucks, projected to reach 304 by 2041. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A912
CrossesBranch
LocationNE of Elizabethton-S OF91
RouteCounty Highway 912
CountyCarter County
StateTennessee
Coordinates36.38235, -82.14246
Functional classUrban Local

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 protection7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadH 20
Structure length27 ft (8.1 m)
Longest span27 ft (8.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2020)
Projected traffic304 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A912 over Branch built?

It was built in 1987, making it 38 years old in 2025.

What condition is Nfa A912 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 A912 over Branch carry?

About 190 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A912 over Branch?

The structure is 27 ft (8.1 m) long with a longest span of 27 ft (8.1 m).

Who owns Nfa A912 over Branch?

It is owned by the County Highway Agency.