US Bridges

Nfa 2475 over Branch

Fair

Grainger County, Tennessee · South of SR1 · Structure no. 29024750001

Built
1977
48 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
48 ft
2 main spans
Daily traffic
270
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2475 over Branch is a concrete culvert carrying Nfa 2475 over Branch in Grainger County, Tennessee. It was built in 1977, so it is 48 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 270 vehicles a day, roughly 3% of them trucks, projected to reach 571 by 2041. The structure is 48 ft (14.6 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNfa 2475
CrossesBranch
LocationSouth of SR1
RouteCounty Highway 2475
CountyGrainger County
StateTennessee
Coordinates36.28259, -83.53336
Functional classRural Minor Collector

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span12 ft (3.7 m)
Deck width35 ft (10.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2021)
Projected traffic571 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 2475 over Branch built?

It was built in 1977, making it 48 years old in 2025.

What condition is Nfa 2475 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 April 2023.

How much traffic does Nfa 2475 over Branch carry?

About 270 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2475 over Branch?

The structure is 48 ft (14.6 m) long with a longest span of 12 ft (3.7 m) and a deck 35 ft wide.

Who owns Nfa 2475 over Branch?

It is owned by the County Highway Agency.