US Bridges

Nfa A510 over Cave Cove Branch

GoodPosted for load

Marion County, Tennessee · 4.3 MI E JCT SR156&FRANK · Structure no. 580A5100005

Built
1963
62 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
210
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A510 over Cave Cove Branch is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa A510 over Cave Cove Branch in Marion County, Tennessee. It was built in 1963, so it is 62 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. Its operating status is: posted for load restriction.

It carries about 210 vehicles a day, roughly 2% of them trucks, projected to reach 336 by 2040. The structure is 120 ft (36.6 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A510
CrossesCave Cove Branch
Location4.3 MI E JCT SR156&FRANK
RouteCounty Highway 510
CountyMarion County
StateTennessee
Coordinates35.17031, -85.79389
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating16.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2020)
Projected traffic336 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$796,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A510 over Cave Cove Branch built?

It was built in 1963, making it 62 years old in 2025.

What condition is Nfa A510 over Cave Cove Branch 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 October 2024.

How much traffic does Nfa A510 over Cave Cove Branch carry?

About 210 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A510 over Cave Cove Branch?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Nfa A510 over Cave Cove Branch?

It is owned by the County Highway Agency.