US Bridges

Nfa A307 over Little Bigby Creek

FairPosted for load

Maury County, Tennessee · 6.5 M. E. Mt. Pleasant. · Structure no. 600A3070003

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
99 ft
3 main spans
Daily traffic
290
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A307 over Little Bigby Creek is a concrete tee beam carrying Nfa A307 over Little Bigby Creek in Maury County, Tennessee. It was built in 1968, so it is 57 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. Its operating status is: posted for load restriction.

It carries about 290 vehicles a day, roughly 2% of them trucks, projected to reach 464 by 2040. The structure is 99 ft (30.2 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A307
CrossesLittle Bigby Creek
Location6.5 M. E. Mt. Pleasant.
RouteCounty Highway 307
CountyMaury County
StateTennessee
Coordinates35.52918, -87.0877
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length99 ft (30.2 m)
Longest span33 ft (10.1 m)
Deck width27 ft (8.2 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2020)
Projected traffic464 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$164,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A307 over Little Bigby Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Nfa A307 over Little Bigby Creek 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 2024.

How much traffic does Nfa A307 over Little Bigby Creek carry?

About 290 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A307 over Little Bigby Creek?

The structure is 99 ft (30.2 m) long with a longest span of 33 ft (10.1 m) and a deck 27 ft wide.

Who owns Nfa A307 over Little Bigby Creek?

It is owned by the County Highway Agency.