US Bridges

FAS 312 over Norman Branch

Good

Hamilton County, Tennessee · 8.72 Mi. S of SR-60 Jct. · Structure no. 33S42690001

Built
1940
85 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
2,137
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 312 over Norman Branch is a concrete continuous culvert carrying FAS 312 over Norman Branch in Hamilton County, Tennessee. It was built in 1940, 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 2,137 vehicles a day, roughly 3% of them trucks, projected to reach 2,656 by 2041. The structure is 31 ft (9.4 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFAS 312
CrossesNorman Branch
Location8.72 Mi. S of SR-60 Jct.
RouteState Highway 312
Coordinates35.25148, -85.06753
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width31 ft (9.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,137 (2021)
Projected traffic2,656 by 2041
Trucks3%
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 312 over Norman Branch built?

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

What condition is FAS 312 over Norman 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 October 2024.

How much traffic does FAS 312 over Norman Branch carry?

About 2,137 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is FAS 312 over Norman Branch?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns FAS 312 over Norman Branch?

It is owned by the State Highway Agency.