US Bridges

FAS 108 over Branch

Fair

Grundy County, Tennessee · Near Marvin Chapel · Structure no. 31SR1080021

Built
1950
75 years old, rebuilt 1967
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
963
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 108 over Branch is a concrete continuous culvert carrying FAS 108 over Branch in Grundy County, Tennessee. It was built in 1950 and reconstructed in 1967, so it is 75 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 963 vehicles a day, roughly 6% of them trucks, projected to reach 3,776 by 2040. The structure is 22 ft (6.6 m) long and 34 ft wide. If it were closed, the detour would be 62.8 mi (101 km).

Location

Open in Google Maps
CarriesFAS 108
CrossesBranch
LocationNear Marvin Chapel
RouteState Highway 108
CountyGrundy County
StateTennessee
Coordinates35.46831, -85.84977
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length22 ft (6.6 m)
Longest span10 ft (3 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic963 (2021)
Projected traffic3,776 by 2040
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 108 over Branch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1967.

What condition is FAS 108 over 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 May 2024.

How much traffic does FAS 108 over Branch carry?

About 963 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAS 108 over Branch?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns FAS 108 over Branch?

It is owned by the State Highway Agency.