US Bridges

Nfa A712 over W Fork of Mulberry CR

Fair

Lincoln County, Tennessee · 4 M. N. Mulberry. · Structure no. 520A7120001

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
2 main spans
Daily traffic
160
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A712 over W Fork of Mulberry CR is a steel stringer/multi-beam or girder carrying Nfa A712 over W Fork of Mulberry CR in Lincoln County, Tennessee. It was built in 1975, so it is 50 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 160 vehicles a day, roughly 2% of them trucks, projected to reach 256 by 2039. The structure is 65 ft (19.8 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesNfa A712
CrossesW Fork of Mulberry CR
Location4 M. N. Mulberry.
RouteCounty Highway 712
CountyLincoln County
StateTennessee
Coordinates35.27307, -86.46298
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span31 ft (9.5 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2020)
Projected traffic256 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 A712 over W Fork of Mulberry CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa A712 over W Fork of Mulberry CR 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 September 2023.

How much traffic does Nfa A712 over W Fork of Mulberry CR carry?

About 160 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A712 over W Fork of Mulberry CR?

The structure is 65 ft (19.8 m) long with a longest span of 31 ft (9.5 m) and a deck 27 ft wide.

Who owns Nfa A712 over W Fork of Mulberry CR?

It is owned by the County Highway Agency.