US Bridges

Nfa A406 over Little Duck River

Fair

Coffee County, Tennessee · 2 MI from SR 2 · Structure no. 160A4060001

Built
1965
60 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
70 ft
2 main spans
Daily traffic
150
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A406 over Little Duck River is a concrete tee beam carrying Nfa A406 over Little Duck River in Coffee County, Tennessee. It was built in 1965, 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 5 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 240 by 2040. The structure is 70 ft (21.3 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A406
CrossesLittle Duck River
Location2 MI from SR 2
RouteCity Street 406
CountyCoffee County
StateTennessee
Coordinates35.46802, -86.06728
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span34 ft (10.4 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic240 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$194,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A406 over Little Duck River built?

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

What condition is Nfa A406 over Little Duck River 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 January 2024.

How much traffic does Nfa A406 over Little Duck River carry?

About 150 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A406 over Little Duck River?

The structure is 70 ft (21.3 m) long with a longest span of 34 ft (10.4 m) and a deck 24 ft wide.

Who owns Nfa A406 over Little Duck River?

It is owned by the City or Municipal Highway Agency.