US Bridges

FAP 10 over Union Branch

Fair

Lincoln County, Tennessee · 4.3 M N JCT SR15 · Structure no. 52SR0100017

Built
1923
102 years old, rebuilt 1965
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
2,329
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 10 over Union Branch is a concrete continuous culvert carrying FAP 10 over Union Branch in Lincoln County, Tennessee. It was built in 1923 and reconstructed in 1965, so it is 102 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 2,329 vehicles a day, roughly 10% of them trucks, projected to reach 3,440 by 2039. The structure is 40 ft (12.3 m) long and 32 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

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CarriesFAP 10
CrossesUnion Branch
Location4.3 M N JCT SR15
RouteU.S. Route 231
CountyLincoln County
StateTennessee
Coordinates35.25855, -86.5657
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,329 (2021)
Projected traffic3,440 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 10 over Union Branch built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1965.

What condition is FAP 10 over Union 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 September 2023.

How much traffic does FAP 10 over Union Branch carry?

About 2,329 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is FAP 10 over Union Branch?

The structure is 40 ft (12.3 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns FAP 10 over Union Branch?

It is owned by the State Highway Agency.