US Bridges

FAS 339 over Cosby Creek

FairPosted for load

Cocke County, Tennessee · 1.1 M of Green Mtn · Structure no. 15S24190003

Built
1955
70 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
92 ft
3 main spans
Daily traffic
2,276
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 339 over Cosby Creek is a concrete tee beam carrying FAS 339 over Cosby Creek in Cocke County, Tennessee. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 2,276 vehicles a day, roughly 5% of them trucks, projected to reach 3,642 by 2042. The structure is 92 ft (28 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesFAS 339
CrossesCosby Creek
Location1.1 M of Green Mtn
RouteState Highway 339
CountyCocke County
StateTennessee
Coordinates35.81542, -83.24796
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length92 ft (28 m)
Longest span40 ft (12.2 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,276 (2021)
Projected traffic3,642 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$472,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 339 over Cosby Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is FAS 339 over Cosby 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 August 2023.

How much traffic does FAS 339 over Cosby Creek carry?

About 2,276 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 339 over Cosby Creek?

The structure is 92 ft (28 m) long with a longest span of 40 ft (12.2 m) and a deck 27 ft wide.

Who owns FAS 339 over Cosby Creek?

It is owned by the State Highway Agency.