US Bridges

Nfa A509 over E. Fk. Third Creek

Fair

Knox County, Tennessee · West Knoxville · Structure no. 470A5090001

Built
1999
26 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
420
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A509 over E. Fk. Third Creek is a concrete slab carrying Nfa A509 over E. Fk. Third Creek in Knox County, Tennessee. It was built in 1999, so it is 26 years old, younger 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 5 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 420 vehicles a day, projected to reach 672 by 2040. The structure is 27 ft (8.2 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNfa A509
CrossesE. Fk. Third Creek
LocationWest Knoxville
RouteCity Street 509
CountyKnox County
StateTennessee
Coordinates35.96753, -83.95298
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2020)
Projected traffic672 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A509 over E. Fk. Third Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is Nfa A509 over E. Fk. Third Creek 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 June 2024.

How much traffic does Nfa A509 over E. Fk. Third Creek carry?

About 420 vehicles per day (2020 count).

How long is Nfa A509 over E. Fk. Third Creek?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Nfa A509 over E. Fk. Third Creek?

It is owned by the City or Municipal Highway Agency.