US Bridges

FAS 312 over SR 312 / I75

Fair

Bradley County, Tennessee · 4 MI South of SR60 · Structure no. 06I00750011

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
245 ft
4 main spans
Daily traffic
7,322
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 312 over SR 312 / I75 is a concrete continuous tee beam carrying FAS 312 over SR 312 / I75 in Bradley County, Tennessee. It was built in 1965, so it is 60 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 7,322 vehicles a day, roughly 4% of them trucks, projected to reach 11,674 by 2042. The structure is 245 ft (74.7 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFAS 312
CrossesSR 312 / I75
Location4 MI South of SR60
RouteState Highway 312
CountyBradley County
StateTennessee
Coordinates35.17643, -84.91738
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length245 ft (74.7 m)
Longest span69 ft (21.1 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,322 (2021)
Projected traffic11,674 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed11.8 mi (19 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAS 312 over SR 312 / I75 built?

It was built in 1965, making it 60 years old in 2025.

What condition is FAS 312 over SR 312 / I75 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 July 2023.

How much traffic does FAS 312 over SR 312 / I75 carry?

About 7,322 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAS 312 over SR 312 / I75?

The structure is 245 ft (74.7 m) long with a longest span of 69 ft (21.1 m) and a deck 37 ft wide.

Who owns FAS 312 over SR 312 / I75?

It is owned by the State Highway Agency.