US Bridges

Nfa A179 over Branch

Fair

Williamson County, Tennessee · 2.5 MI SW JCT SR96&SR252 · Structure no. 940A1790001

Built
1980
45 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A179 over Branch is a concrete culvert carrying Nfa A179 over Branch in Williamson County, Tennessee. It was built in 1980, so it is 45 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 480 by 2041. The structure is 23 ft (7 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A179
CrossesBranch
Location2.5 MI SW JCT SR96&SR252
RouteCounty Highway 179
CountyWilliamson County
StateTennessee
Coordinates35.87402, -86.75567
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span18 ft (5.5 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic480 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 A179 over Branch built?

It was built in 1980, making it 45 years old in 2025.

What condition is Nfa A179 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 April 2023.

How much traffic does Nfa A179 over Branch carry?

About 300 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A179 over Branch?

The structure is 23 ft (7 m) long with a longest span of 18 ft (5.5 m) and a deck 26 ft wide.

Who owns Nfa A179 over Branch?

It is owned by the County Highway Agency.