US Bridges

Nfa A025 over Turnbull Creek

Good

Williamson County, Tennessee · On Liberty Road · Structure no. 940A0250003

Built
1991
34 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A025 over Turnbull Creek is a concrete culvert carrying Nfa A025 over Turnbull Creek in Williamson County, Tennessee. It was built in 1991, so it is 34 years old, younger 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 30 vehicles a day, roughly 1% of them trucks, projected to reach 48 by 2041. The structure is 30 ft (9.1 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNfa A025
CrossesTurnbull Creek
LocationOn Liberty Road
RouteCounty Highway 25
Coordinates35.93563, -87.17862
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span21 ft (6.4 m)
Deck width29 ft (8.8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2041
Trucks1%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A025 over Turnbull Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Nfa A025 over Turnbull Creek 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 June 2023.

How much traffic does Nfa A025 over Turnbull Creek carry?

About 30 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa A025 over Turnbull Creek?

The structure is 30 ft (9.1 m) long with a longest span of 21 ft (6.4 m) and a deck 29 ft wide.

Who owns Nfa A025 over Turnbull Creek?

It is owned by the County Highway Agency.