US Bridges

FAS 108 over Dry Branch

Fair

Warren County, Tennessee · 2.1 MI S of SR55 · Structure no. 89SR1080011

Built
1943
82 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
2,500
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 108 over Dry Branch is a concrete continuous culvert carrying FAS 108 over Dry Branch in Warren County, Tennessee. It was built in 1943, so it is 82 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.

It carries about 2,500 vehicles a day, roughly 6% of them trucks, projected to reach 4,914 by 2041. The structure is 23 ft (6.9 m) long and 37 ft wide. If it were closed, the detour would be 62.8 mi (101 km).

CarriesFAS 108
CrossesDry Branch
Location2.1 MI S of SR55
RouteState Highway 108
Coordinates35.62967, -85.789
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length23 ft (6.9 m)
Longest span10 ft (3 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2021)
Projected traffic4,914 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.8 mi (101 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 108 over Dry Branch built?

It was built in 1943, making it 82 years old in 2025.

What condition is FAS 108 over Dry Branch 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 February 2025.

How much traffic does FAS 108 over Dry Branch carry?

About 2,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAS 108 over Dry Branch?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3 m) and a deck 37 ft wide.

Who owns FAS 108 over Dry Branch?

It is owned by the State Highway Agency.