US Bridges

Nfa A312 over Bednigo Branch

Good

Robertson County, Tennessee · 2 MI SE JCT SR65&SR257 · Structure no. 740A3120005

Built
1975
50 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
370
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A312 over Bednigo Branch is a concrete continuous culvert carrying Nfa A312 over Bednigo Branch in Robertson County, Tennessee. It was built in 1975, so it is 50 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 370 vehicles a day, roughly 2% of them trucks, projected to reach 592 by 2042. The structure is 32 ft (9.8 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A312
CrossesBednigo Branch
Location2 MI SE JCT SR65&SR257
RouteCounty Highway 0A312
CountyRobertson County
StateTennessee
Coordinates36.41333, -86.89317
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.5 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length32 ft (9.8 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic370 (2020)
Projected traffic592 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$235,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A312 over Bednigo Branch built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa A312 over Bednigo Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Nfa A312 over Bednigo Branch carry?

About 370 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A312 over Bednigo Branch?

The structure is 32 ft (9.8 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa A312 over Bednigo Branch?

It is owned by the County Highway Agency.