US Bridges

Nfa A485 over Turnipseed Creek

Good

Cheatham County, Tennessee · 1 M. Nw. SR250. · Structure no. 110A4850001

Built
1970
55 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A485 over Turnipseed Creek is a concrete continuous culvert carrying Nfa A485 over Turnipseed Creek in Cheatham County, Tennessee. It was built in 1970, so it is 55 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 90 vehicles a day, roughly 4% of them trucks, projected to reach 144 by 2040. The structure is 31 ft (9.4 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNfa A485
CrossesTurnipseed Creek
Location1 M. Nw. SR250.
RouteCounty Highway 485
Coordinates36.21878, -87.16838
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 inspectionAugust 2024
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 rating62.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length31 ft (9.4 m)
Longest span12 ft (3.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 by 2040
Trucks4%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A485 over Turnipseed Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa A485 over Turnipseed 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 August 2024.

How much traffic does Nfa A485 over Turnipseed Creek carry?

About 90 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A485 over Turnipseed Creek?

The structure is 31 ft (9.4 m) long with a longest span of 12 ft (3.7 m) and a deck 28 ft wide.

Who owns Nfa A485 over Turnipseed Creek?

It is owned by the County Highway Agency.