US Bridges

Nfa A512 over Cave Cove Branch

Fair

Marion County, Tennessee · 4.9 MI NE JCT I24&SR2 · Structure no. 580A5120007

Built
1946
79 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
110
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A512 over Cave Cove Branch is a concrete tee beam carrying Nfa A512 over Cave Cove Branch in Marion County, Tennessee. It was built in 1946, so it is 79 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 110 vehicles a day, roughly 2% of them trucks, projected to reach 176 by 2040. The structure is 86 ft (26.1 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A512
CrossesCave Cove Branch
Location4.9 MI NE JCT I24&SR2
RouteCounty Highway 512
CountyMarion County
StateTennessee
Coordinates35.17086, -85.79346
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length86 ft (26.1 m)
Longest span29 ft (8.7 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2020)
Projected traffic176 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Nfa A512 over Cave Cove Branch built?

It was built in 1946, making it 79 years old in 2025.

What condition is Nfa A512 over Cave Cove Branch 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 October 2024.

How much traffic does Nfa A512 over Cave Cove Branch carry?

About 110 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A512 over Cave Cove Branch?

The structure is 86 ft (26.1 m) long with a longest span of 29 ft (8.7 m) and a deck 34 ft wide.

Who owns Nfa A512 over Cave Cove Branch?

It is owned by the County Highway Agency.