US Bridges

Nfa A143 (sa 9436) over Branch

Fair

Williamson County, Tennessee · 3.2 MI SE JCT SR11&SR253 · Structure no. 940A1430001

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
56 ft
2 main spans
Daily traffic
630
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A143 (sa 9436) over Branch is a concrete continuous culvert carrying Nfa A143 (sa 9436) over Branch in Williamson County, Tennessee. It was built in 1970, so it is 55 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 5 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 630 vehicles a day, roughly 2% of them trucks, projected to reach 1,008 by 2041. The structure is 56 ft (17.1 m) long and 26 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesNfa A143 (sa 9436)
CrossesBranch
Location3.2 MI SE JCT SR11&SR253
RouteCity Street 143
CountyWilliamson County
StateTennessee
Coordinates35.95155, -86.673
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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
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 rating47.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span21 ft (6.4 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic630 (2020)
Projected traffic1,008 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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$149,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A143 (sa 9436) over Branch built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa A143 (sa 9436) 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 A143 (sa 9436) over Branch carry?

About 630 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A143 (sa 9436) over Branch?

The structure is 56 ft (17.1 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Nfa A143 (sa 9436) over Branch?

It is owned by the County Highway Agency.