US Bridges

FAS 156 over Alley Gulf Branch

Fair

Marion County, Tennessee · 0.2 MI S. of I-24 · Structure no. 58SR1560011

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,419
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 156 over Alley Gulf Branch is a concrete continuous culvert carrying FAS 156 over Alley Gulf Branch in Marion County, Tennessee. It was built in 1975, so it is 50 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 1,419 vehicles a day, roughly 5% of them trucks, projected to reach 2,080 by 2040. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFAS 156
CrossesAlley Gulf Branch
Location0.2 MI S. of I-24
RouteState Highway 156
CountyMarion County
StateTennessee
Coordinates35.01322, -85.54532
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,419 (2021)
Projected traffic2,080 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 156 over Alley Gulf Branch built?

It was built in 1975, making it 50 years old in 2025.

What condition is FAS 156 over Alley Gulf 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 August 2024.

How much traffic does FAS 156 over Alley Gulf Branch carry?

About 1,419 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 156 over Alley Gulf Branch?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns FAS 156 over Alley Gulf Branch?

It is owned by the State Highway Agency.