US Bridges

Nfa 1001 (sa 9418) over Branch

Fair

Williamson County, Tennessee · 4.8 MI SW JCT SR46&SR96 · Structure no. 94010010005

Built
1984
41 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
496
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1001 (sa 9418) over Branch is a concrete continuous culvert carrying Nfa 1001 (sa 9418) over Branch in Williamson 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 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 496 vehicles a day, roughly 3% of them trucks, projected to reach 592 by 2041. The structure is 27 ft (8.2 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 1001 (sa 9418)
CrossesBranch
Location4.8 MI SW JCT SR46&SR96
RouteCounty Highway 1001
CountyWilliamson County
StateTennessee
Coordinates35.91415, -87.02253
Functional classRural Minor Collector

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 inspectionMay 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 alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic496 (2021)
Projected traffic592 by 2041
Trucks3%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$70,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1001 (sa 9418) over Branch built?

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

What condition is Nfa 1001 (sa 9418) 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 May 2023.

How much traffic does Nfa 1001 (sa 9418) over Branch carry?

About 496 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1001 (sa 9418) over Branch?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m) and a deck 27 ft wide.

Who owns Nfa 1001 (sa 9418) over Branch?

It is owned by the County Highway Agency.