US Bridges

Nfa A657 over Heaton Creek

Good

Carter County, Tennessee · E of SR 143-2MI S.Of SR37 · Structure no. 100A6570005

Built
1986
39 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
500
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A657 over Heaton Creek is a concrete culvert carrying Nfa A657 over Heaton Creek in Carter County, Tennessee. It was built in 1986, so it is 39 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 800 by 2041. The structure is 24 ft (7.3 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A657
CrossesHeaton Creek
LocationE of SR 143-2MI S.Of SR37
RouteCounty Highway 657
CountyCarter County
StateTennessee
Coordinates36.14008, -82.0763
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span21 ft (6.5 m)
Deck width26 ft (7.9 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2020)
Projected traffic800 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$41,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A657 over Heaton Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa A657 over Heaton 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 July 2023.

How much traffic does Nfa A657 over Heaton Creek carry?

About 500 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A657 over Heaton Creek?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.5 m) and a deck 26 ft wide.

Who owns Nfa A657 over Heaton Creek?

It is owned by the County Highway Agency.