US Bridges

Nfa 927 (sa 4305) over Harman Branch

Fair

Humphreys County, Tennessee · 6 M. SE New Johnsonville · Structure no. 43S61700005

Built
1965
60 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
305
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 927 (sa 4305) over Harman Branch is a concrete continuous culvert carrying Nfa 927 (sa 4305) over Harman Branch in Humphreys 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 305 vehicles a day, roughly 3% of them trucks, projected to reach 488 by 2042. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 927 (sa 4305)
CrossesHarman Branch
Location6 M. SE New Johnsonville
RouteCounty Highway 927
CountyHumphreys County
StateTennessee
Coordinates36.01183, -87.93
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic305 (2021)
Projected traffic488 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$323,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 927 (sa 4305) over Harman Branch built?

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

What condition is Nfa 927 (sa 4305) over Harman 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 November 2023.

How much traffic does Nfa 927 (sa 4305) over Harman Branch carry?

About 305 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 927 (sa 4305) over Harman Branch?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m).

Who owns Nfa 927 (sa 4305) over Harman Branch?

It is owned by the County Highway Agency.