US Bridges

FAU 158 Rl over Ft Loudon Lk Backwaters

Fair

Knox County, Tennessee · In Knoxville · Structure no. 47SR1580009

Built
1973
52 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
12,073
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 158 Rl over Ft Loudon Lk Backwaters is a prestressed concrete box beam or girders - single or spread carrying FAU 158 Rl over Ft Loudon Lk Backwaters in Knox County, Tennessee. It was built in 1973, so it is 52 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 12,073 vehicles a day, roughly 9% of them trucks, projected to reach 27,918 by 2042. The structure is 93 ft (28.4 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAU 158 Rl
CrossesFt Loudon Lk Backwaters
LocationIn Knoxville
RouteFederal Lands Road 158
Coordinates35.94627, -83.92598
Functional classUrban Other Principal 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating22.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length93 ft (28.4 m)
Longest span79 ft (24.2 m)
Deck width39 ft (12 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,073 (2021)
Projected traffic27,918 by 2042
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 158 Rl over Ft Loudon Lk Backwaters built?

It was built in 1973, making it 52 years old in 2025.

What condition is FAU 158 Rl over Ft Loudon Lk Backwaters 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 January 2024.

How much traffic does FAU 158 Rl over Ft Loudon Lk Backwaters carry?

About 12,073 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAU 158 Rl over Ft Loudon Lk Backwaters?

The structure is 93 ft (28.4 m) long with a longest span of 79 ft (24.2 m) and a deck 39 ft wide.

Who owns FAU 158 Rl over Ft Loudon Lk Backwaters?

It is owned by the State Highway Agency.