US Bridges

Nfa A246 over Quinn Branch

Fair

Williamson County, Tennessee · 3.2 MI SW JCT SR96&SR100 · Structure no. 940A2460003

Built
1940
85 years old, rebuilt 1978
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
380
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A246 over Quinn Branch is a concrete continuous culvert carrying Nfa A246 over Quinn Branch in Williamson County, Tennessee. It was built in 1940 and reconstructed in 1978, so it is 85 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 380 vehicles a day, roughly 2% of them trucks, projected to reach 608 by 2041. The structure is 36 ft (11 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa A246
CrossesQuinn Branch
Location3.2 MI SW JCT SR96&SR100
RouteCounty Highway 246
CountyWilliamson County
StateTennessee
Coordinates35.98947, -87.17136
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 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 rating59.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length36 ft (11 m)
Longest span10 ft (3 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2020)
Projected traffic608 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$257,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A246 over Quinn Branch built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1978.

What condition is Nfa A246 over Quinn 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 A246 over Quinn Branch carry?

About 380 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A246 over Quinn Branch?

The structure is 36 ft (11 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns Nfa A246 over Quinn Branch?

It is owned by the County Highway Agency.