US Bridges

FAS 108 over Branch

Good

Grundy County, Tennessee · 3 Mi.S.Of Warren Co. Line · Structure no. 31SR1080023

Built
1940
85 years old, rebuilt 2020
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
963
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 108 over Branch is a prestressed concrete box beam or girders - single or spread carrying FAS 108 over Branch in Grundy County, Tennessee. It was built in 1940 and reconstructed in 2020, so it is 85 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 963 vehicles a day, roughly 6% of them trucks, projected to reach 3,776 by 2040. The structure is 63 ft (19.2 m) long and 31 ft wide. If it were closed, the detour would be 62.8 mi (101 km).

CarriesFAS 108
CrossesBranch
Location3 Mi.S.Of Warren Co. Line
RouteState Highway 108
Coordinates35.48462, -85.86723
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than 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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length63 ft (19.2 m)
Longest span63 ft (19.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 108 over Branch built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2020.

What condition is FAS 108 over Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. 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 63 ft (19.2 m) long with a longest span of 63 ft (19.2 m) and a deck 31 ft wide.

Who owns FAS 108 over Branch?

It is owned by the State Highway Agency.