US Bridges

Nfa A122 over Branch

Good

Lawrence County, Tennessee · 2.2 M. Sw. Summertown · Structure no. 500A1220001

Built
1984
41 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete Continuous
Length
37 ft
3 main spans
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A122 over Branch is a concrete continuous culvert carrying Nfa A122 over Branch in Lawrence County, Tennessee. It was built in 1984, so it is 41 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90 vehicles a day, roughly 2% of them trucks, projected to reach 144 by 2042. The structure is 37 ft (11.4 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNfa A122
CrossesBranch
Location2.2 M. Sw. Summertown
RouteCounty Highway 122
Coordinates35.4002, -87.3439
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length37 ft (11.4 m)
Longest span12 ft (3.7 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 A122 over Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A122 over Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Nfa A122 over Branch carry?

About 90 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A122 over Branch?

The structure is 37 ft (11.4 m) long with a longest span of 12 ft (3.7 m) and a deck 25 ft wide.

Who owns Nfa A122 over Branch?

It is owned by the County Highway Agency.