US Bridges

FAS 310 over Big Branch

Fair

McMinn County, Tennessee · 3 M FM Monroe-Mcminn C L · Structure no. 54S42760005

Built
1992
33 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
1,233
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 310 over Big Branch is a concrete continuous culvert carrying FAS 310 over Big Branch in McMinn County, Tennessee. It was built in 1992, so it is 33 years old, younger 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 1,233 vehicles a day, roughly 6% of them trucks, projected to reach 2,168 by 2041. The structure is 39 ft (11.9 m) long and 69 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS 310
CrossesBig Branch
Location3 M FM Monroe-Mcminn C L
RouteState Highway 310
CountyMcMinn County
StateTennessee
Coordinates35.34113, -84.4725
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
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
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width69 ft (21.1 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,233 (2021)
Projected traffic2,168 by 2041
Trucks6%
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 310 over Big Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is FAS 310 over Big 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 April 2023.

How much traffic does FAS 310 over Big Branch carry?

About 1,233 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAS 310 over Big Branch?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 69 ft wide.

Who owns FAS 310 over Big Branch?

It is owned by the State Highway Agency.