US Bridges

Nfa A571 over Thomas Petty Branch

Fair

Maury County, Tennessee · 3.5 M. W. Spring Hill · Structure no. 600A5710003

Built
1984
41 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
120
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A571 over Thomas Petty Branch is a concrete continuous culvert carrying Nfa A571 over Thomas Petty Branch in Maury 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 120 vehicles a day, roughly 2% of them trucks, projected to reach 192 by 2040. The structure is 37 ft (11.3 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A571
CrossesThomas Petty Branch
Location3.5 M. W. Spring Hill
RouteCounty Highway 571
CountyMaury County
StateTennessee
Coordinates35.7435, -86.99609
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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic192 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$265,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A571 over Thomas Petty Branch built?

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

What condition is Nfa A571 over Thomas Petty 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 2024.

How much traffic does Nfa A571 over Thomas Petty Branch carry?

About 120 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A571 over Thomas Petty Branch?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.

Who owns Nfa A571 over Thomas Petty Branch?

It is owned by the County Highway Agency.