US Bridges

FAS 304 over Backwaters of Watts Bar

Good

Roane County, Tennessee · W of Highway 58 · Structure no. 73S24710003

Built
1950
75 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
806
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 304 over Backwaters of Watts Bar is a concrete continuous culvert carrying FAS 304 over Backwaters of Watts Bar in Roane County, Tennessee. It was built in 1950, so it is 75 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 806 vehicles a day, roughly 4% of them trucks, projected to reach 1,434 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFAS 304
CrossesBackwaters of Watts Bar
LocationW of Highway 58
RouteState Highway 304
Coordinates35.7763, -84.61767
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
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 rating64.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 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 traffic806 (2021)
Projected traffic1,434 by 2041
Trucks4%
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 FAS 304 over Backwaters of Watts Bar built?

It was built in 1950, making it 75 years old in 2025.

What condition is FAS 304 over Backwaters of Watts Bar 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 2023.

How much traffic does FAS 304 over Backwaters of Watts Bar carry?

About 806 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAS 304 over Backwaters of Watts Bar?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns FAS 304 over Backwaters of Watts Bar?

It is owned by the State Highway Agency.