US Bridges

FAS 346 over Holston River

Fair

Hawkins County, Tennessee · NW Corner of Sullivan CO · Structure no. 37S24620001

Built
1977
48 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
403 ft
6 main spans
Daily traffic
7,976
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 346 over Holston River is a prestressed concrete continuous stringer/multi-beam or girder carrying FAS 346 over Holston River in Hawkins County, Tennessee. It was built in 1977, so it is 48 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 7,976 vehicles a day, roughly 4% of them trucks, projected to reach 11,178 by 2041. The structure is 403 ft (122.7 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS 346
CrossesHolston River
LocationNW Corner of Sullivan CO
RouteState Highway 346
CountyHawkins County
StateTennessee
Coordinates36.58917, -82.60647
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length403 ft (122.7 m)
Longest span77 ft (23.5 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,976 (2021)
Projected traffic11,178 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed5 mi (8 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$1.8 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 346 over Holston River built?

It was built in 1977, making it 48 years old in 2025.

What condition is FAS 346 over Holston 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 August 2024.

How much traffic does FAS 346 over Holston River carry?

About 7,976 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAS 346 over Holston River?

The structure is 403 ft (122.7 m) long with a longest span of 77 ft (23.5 m) and a deck 32 ft wide.

Who owns FAS 346 over Holston River?

It is owned by the State Highway Agency.