US Bridges

Nfa A230 over Tar Creek

FairPosted for load

Chester County, Tennessee · 0.1 MI North of Mcnairy · Structure no. 120A2300001

Built
1965
60 years old, rebuilt 2009
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
3 main spans
Daily traffic
1,430
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A230 over Tar Creek is a wood or timber stringer/multi-beam or girder carrying Nfa A230 over Tar Creek in Chester County, Tennessee. It was built in 1965 and reconstructed in 2009, so it is 60 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 6 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 1,430 vehicles a day, roughly 5% of them trucks, projected to reach 2,288 by 2041. The structure is 47 ft (14.2 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A230
CrossesTar Creek
Location0.1 MI North of Mcnairy
RouteCounty Highway 230
CountyChester County
StateTennessee
Coordinates35.38411, -88.56611
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.4 US tons
Inventory rating16.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length47 ft (14.2 m)
Longest span17 ft (5.2 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,430 (2020)
Projected traffic2,288 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$317,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A230 over Tar Creek built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2009.

What condition is Nfa A230 over Tar 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 2023.

How much traffic does Nfa A230 over Tar Creek carry?

About 1,430 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Nfa A230 over Tar Creek?

The structure is 47 ft (14.2 m) long with a longest span of 17 ft (5.2 m) and a deck 16 ft wide.

Who owns Nfa A230 over Tar Creek?

It is owned by the County Highway Agency.