US Bridges

Nfa A731 over South Fork Harris Fk CR

Fair

Obion County, Tennessee · In the City of So Fulton · Structure no. 660A7310001

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
1,460
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A731 over South Fork Harris Fk CR is a steel stringer/multi-beam or girder carrying Nfa A731 over South Fork Harris Fk CR in Obion County, Tennessee. It was built in 1965, so it is 60 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 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 1,460 vehicles a day, roughly 4% of them trucks, projected to reach 2,336 by 2041. The structure is 33 ft (10.1 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A731
CrossesSouth Fork Harris Fk CR
LocationIn the City of So Fulton
RouteCity Street 731
CountyObion County
StateTennessee
Coordinates36.4995, -88.86828
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span33 ft (10.1 m)
Deck width16 ft (4.8 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,460 (2020)
Projected traffic2,336 by 2041
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$248,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A731 over South Fork Harris Fk CR built?

It was built in 1965, making it 60 years old in 2025.

What condition is Nfa A731 over South Fork Harris Fk 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 March 2023.

How much traffic does Nfa A731 over South Fork Harris Fk CR carry?

About 1,460 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A731 over South Fork Harris Fk CR?

The structure is 33 ft (10.1 m) long with a longest span of 33 ft (10.1 m) and a deck 16 ft wide.

Who owns Nfa A731 over South Fork Harris Fk CR?

It is owned by the City or Municipal Highway Agency.