US Bridges

Nfa A378 over Birdsong Creek

Good

Benton County, Tennessee · 1.7 MI NW JCT Carr.&decat · Structure no. 030A3780001

Built
2008
17 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A378 over Birdsong Creek is a concrete continuous culvert carrying Nfa A378 over Birdsong Creek in Benton County, Tennessee. It was built in 2008, so it is 17 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 9% of them trucks, projected to reach 16 by 2042. The structure is 26 ft (7.9 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNfa A378
CrossesBirdsong Creek
Location1.7 MI NW JCT Carr.&decat
RouteCounty Highway 378
Coordinates35.8638, -88.19772
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic16 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A378 over Birdsong Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Nfa A378 over Birdsong Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does Nfa A378 over Birdsong Creek carry?

About 10 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is Nfa A378 over Birdsong Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.

Who owns Nfa A378 over Birdsong Creek?

It is owned by the County Highway Agency.