US Bridges

Nfa A399 over Branch

Poor

Madison County, Tennessee · 2.9 MI NW JCT SR138&SR223 · Structure no. 570A3990001

Built
1984
41 years old
Condition
Poor
inspected May 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A399 over Branch is a concrete continuous culvert carrying Nfa A399 over Branch in Madison County, Tennessee. It was built in 1984, so it is 41 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 20 vehicles a day, roughly 4% of them trucks, projected to reach 32 by 2041. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A399
CrossesBranch
Location2.9 MI NW JCT SR138&SR223
RouteCounty Highway 399
CountyMadison County
StateTennessee
Coordinates35.48772, -89.06778
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating82.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic32 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 A399 over Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A399 over Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does Nfa A399 over Branch carry?

About 20 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A399 over Branch?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns Nfa A399 over Branch?

It is owned by the County Highway Agency.