US Bridges

Nfa A515 over I75

Fair

Anderson County, Tennessee · 2.5 M NE of Knox CO Line · Structure no. 01I00750007

Built
1969
56 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
215 ft
2 main spans
Daily traffic
830
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa A515 over I75 is a concrete continuous box beam or girders - multiple carrying Nfa A515 over I75 in Anderson County, Tennessee. It was built in 1969, so it is 56 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 830 vehicles a day, roughly 2% of them trucks, projected to reach 1,328 by 2041. The structure is 215 ft (65.6 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A515
CrossesI75
Location2.5 M NE of Knox CO Line
RouteCounty Highway 515
CountyAnderson County
StateTennessee
Coordinates36.14463, -84.05397
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.2 US tons
Inventory rating42.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length215 ft (65.6 m)
Longest span110 ft (33.5 m)
Deck width32 ft (9.9 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic830 (2020)
Projected traffic1,328 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A515 over I75 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nfa A515 over I75 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 July 2023.

How much traffic does Nfa A515 over I75 carry?

About 830 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A515 over I75?

The structure is 215 ft (65.6 m) long with a longest span of 110 ft (33.5 m) and a deck 32 ft wide.

Who owns Nfa A515 over I75?

It is owned by the State Highway Agency.