US Bridges

FAU 320 over Small Stream

Good

Hamilton County, Tennessee · 0.08 Mi. E of I-75 Jct. · Structure no. 33S43070003

Built
1965
60 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
42,055
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 320 over Small Stream is a concrete continuous culvert carrying FAU 320 over Small Stream in Hamilton 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 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 42,055 vehicles a day, roughly 6% of them trucks, projected to reach 68,891 by 2042. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFAU 320
CrossesSmall Stream
Location0.08 Mi. E of I-75 Jct.
RouteState Highway 320
Coordinates35.01708, -85.17795
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,055 (2021)
Projected traffic68,891 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 FAU 320 over Small Stream built?

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

What condition is FAU 320 over Small Stream 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 December 2024.

How much traffic does FAU 320 over Small Stream carry?

About 42,055 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAU 320 over Small Stream?

The structure is 38 ft (11.6 m) long with a longest span of 10 ft (3 m).

Who owns FAU 320 over Small Stream?

It is owned by the State Highway Agency.