US Bridges

Nfa A307 over Dry Branch

Good

Benton County, Tennessee · 3.5 MI NE JCT SR69&I40 · Structure no. 030A3070005

Built
1991
34 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
80
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A307 over Dry Branch is a concrete continuous culvert carrying Nfa A307 over Dry Branch in Benton County, Tennessee. It was built in 1991, so it is 34 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 80 vehicles a day, roughly 2% of them trucks, projected to reach 128 by 2042. The structure is 33 ft (10.1 m) long and 31 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesNfa A307
CrossesDry Branch
Location3.5 MI NE JCT SR69&I40
RouteCounty Highway 307
Coordinates35.85542, -88.02961
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span15 ft (4.7 m)
Deck width31 ft (9.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2020)
Projected traffic128 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 A307 over Dry Branch built?

It was built in 1991, making it 34 years old in 2025.

What condition is Nfa A307 over Dry Branch 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 A307 over Dry Branch carry?

About 80 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A307 over Dry Branch?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.7 m) and a deck 31 ft wide.

Who owns Nfa A307 over Dry Branch?

It is owned by the County Highway Agency.