US Bridges

FAS 50 over Elk River

FairPosted for load

Grundy County, Tennessee · In the Elkhead Community · Structure no. 31S43240003

Built
1956
69 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
142 ft
5 main spans
Daily traffic
1,872
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 50 over Elk River is a concrete tee beam carrying FAS 50 over Elk River in Grundy County, Tennessee. It was built in 1956, so it is 69 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 1,872 vehicles a day, roughly 5% of them trucks, projected to reach 2,995 by 2042. The structure is 142 ft (43.4 m) long and 29 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesFAS 50
CrossesElk River
LocationIn the Elkhead Community
RouteState Highway 50
Coordinates35.35758, -85.83652
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
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length142 ft (43.4 m)
Longest span29 ft (8.7 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,872 (2021)
Projected traffic2,995 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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$397,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 50 over Elk River built?

It was built in 1956, making it 69 years old in 2025.

What condition is FAS 50 over Elk 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 May 2024.

How much traffic does FAS 50 over Elk River carry?

About 1,872 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 50 over Elk River?

The structure is 142 ft (43.4 m) long with a longest span of 29 ft (8.7 m) and a deck 29 ft wide.

Who owns FAS 50 over Elk River?

It is owned by the State Highway Agency.