US Bridges

Nfa 1715 (sa 4015) over Henson Branch

Fair

Henry County, Tennessee · 1 MI N of SR76 · Structure no. 40S82370001

Built
1960
65 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
46 ft
4 main spans
Daily traffic
1,692
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1715 (sa 4015) over Henson Branch is a concrete continuous culvert carrying Nfa 1715 (sa 4015) over Henson Branch in Henry County, Tennessee. It was built in 1960, so it is 65 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 1,692 vehicles a day, roughly 3% of them trucks, projected to reach 2,707 by 2042. The structure is 46 ft (14 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1715 (sa 4015)
CrossesHenson Branch
Location1 MI N of SR76
RouteCounty Highway 1715
CountyHenry County
StateTennessee
Coordinates36.34294, -88.26269
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadH 15
Structure length46 ft (14 m)
Longest span10 ft (3 m)
Deck width34 ft (10.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,692 (2021)
Projected traffic2,707 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1715 (sa 4015) over Henson Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa 1715 (sa 4015) over Henson 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 September 2023.

How much traffic does Nfa 1715 (sa 4015) over Henson Branch carry?

About 1,692 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1715 (sa 4015) over Henson Branch?

The structure is 46 ft (14 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns Nfa 1715 (sa 4015) over Henson Branch?

It is owned by the County Highway Agency.