US Bridges

Nfa A345 over Branch

Fair

Polk County, Tennessee · 1.1 MI SW JCT SR30&SR33 · Structure no. 700A3450003

Built
1930
95 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A345 over Branch is a concrete continuous culvert carrying Nfa A345 over Branch in Polk County, Tennessee. It was built in 1930, so it is 95 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 90 vehicles a day, roughly 2% of them trucks, projected to reach 144 by 2042. The structure is 28 ft (8.5 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesNfa A345
CrossesBranch
Location1.1 MI SW JCT SR30&SR33
RouteCounty Highway 345
CountyPolk County
StateTennessee
Coordinates35.0288, -84.4005
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length28 ft (8.5 m)
Longest span8 ft (2.4 m)
Deck width26 ft (7.8 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 by 2042
Trucks2%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A345 over Branch built?

It was built in 1930, making it 95 years old in 2025.

What condition is Nfa A345 over 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 May 2024.

How much traffic does Nfa A345 over Branch carry?

About 90 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A345 over Branch?

The structure is 28 ft (8.5 m) long with a longest span of 8 ft (2.4 m) and a deck 26 ft wide.

Who owns Nfa A345 over Branch?

It is owned by the County Highway Agency.