US Bridges

Nfa B121 over Branch

Fair

Sumner County, Tennessee · 2.3 MI NE JCT SR6 & SR76 · Structure no. 830B1210005

Built
1983
42 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
240
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa B121 over Branch is a concrete continuous culvert carrying Nfa B121 over Branch in Sumner County, Tennessee. It was built in 1983, so it is 42 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 240 vehicles a day, roughly 11% of them trucks, projected to reach 384 by 2041. The structure is 31 ft (9.4 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa B121
CrossesBranch
Location2.3 MI NE JCT SR6 & SR76
RouteCounty Highway 0B121
CountySumner County
StateTennessee
Coordinates36.51528, -86.24358
Functional classRural 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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2020)
Projected traffic384 by 2041
Trucks11%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$52,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B121 over Branch built?

It was built in 1983, making it 42 years old in 2025.

What condition is Nfa B121 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 November 2024.

How much traffic does Nfa B121 over Branch carry?

About 240 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Nfa B121 over Branch?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.

Who owns Nfa B121 over Branch?

It is owned by the County Highway Agency.