US Bridges

Nfa A364 over Smith Branch

Fair

Williamson County, Tennessee · 6.7 MI SE JCT SR46&SR100 · Structure no. 940A3640001

Built
1930
95 years old, rebuilt 1960
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
26 ft
1 main span
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A364 over Smith Branch is a concrete tee beam carrying Nfa A364 over Smith Branch in Williamson County, Tennessee. It was built in 1930 and reconstructed in 1960, so it is 95 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 90 vehicles a day, roughly 2% of them trucks, projected to reach 144 by 2041. The structure is 26 ft (7.9 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A364
CrossesSmith Branch
Location6.7 MI SE JCT SR46&SR100
RouteCounty Highway 364
CountyWilliamson County
StateTennessee
Coordinates35.86412, -87.11933
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 A364 over Smith Branch built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1960.

What condition is Nfa A364 over Smith 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 June 2023.

How much traffic does Nfa A364 over Smith Branch carry?

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

How long is Nfa A364 over Smith Branch?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 22 ft wide.

Who owns Nfa A364 over Smith Branch?

It is owned by the County Highway Agency.