US Bridges

Nfa A031 over Spring Branch

Fair

Houston County, Tennessee · 1 M. N. Erin. · Structure no. 420A0310001

Built
1972
53 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
70
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A031 over Spring Branch is a concrete continuous culvert carrying Nfa A031 over Spring Branch in Houston County, Tennessee. It was built in 1972, so it is 53 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 70 vehicles a day, roughly 2% of them trucks, projected to reach 112 by 2042. The structure is 24 ft (7.3 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa A031
CrossesSpring Branch
Location1 M. N. Erin.
RouteCounty Highway 31
CountyHouston County
StateTennessee
Coordinates36.33002, -87.69375
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2020)
Projected traffic112 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 A031 over Spring Branch built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nfa A031 over Spring 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 January 2024.

How much traffic does Nfa A031 over Spring Branch carry?

About 70 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A031 over Spring Branch?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m) and a deck 25 ft wide.

Who owns Nfa A031 over Spring Branch?

It is owned by the County Highway Agency.