US Bridges

Nfa 1731 over Little John Branch

FairPosted for load

Hardin County, Tennessee · Center Hill RD · Structure no. 360A3710001

Built
1975
50 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
29 ft
1 main span
Daily traffic
148
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1731 over Little John Branch is a concrete stringer/multi-beam or girder carrying Nfa 1731 over Little John Branch in Hardin 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 148 vehicles a day, roughly 3% of them trucks, projected to reach 237 by 2042. The structure is 29 ft (8.8 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa 1731
CrossesLittle John Branch
LocationCenter Hill RD
RouteCounty Highway 1731
CountyHardin County
StateTennessee
Coordinates35.00056, -88.33694
Functional classRural Minor Collector

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.
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 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17.9 US tons
Inventory rating13.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic148 (2021)
Projected traffic237 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$169,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1731 over Little John Branch built?

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

What condition is Nfa 1731 over Little John 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 March 2024.

How much traffic does Nfa 1731 over Little John Branch carry?

About 148 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1731 over Little John Branch?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 27 ft wide.

Who owns Nfa 1731 over Little John Branch?

It is owned by the County Highway Agency.