US Bridges

Nfa A479 over Branch

FairPosted for load

Madison County, Tennessee · 4.6 MI SE JCT I40&SR152 · Structure no. 570A4790001

Built
1974
51 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
2 main spans
Daily traffic
310
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A479 over Branch is a wood or timber stringer/multi-beam or girder carrying Nfa A479 over Branch in Madison County, Tennessee. It was built in 1974, so it is 51 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. Its operating status is: posted for load restriction.

It carries about 310 vehicles a day, roughly 2% of them trucks, projected to reach 496 by 2041. The structure is 34 ft (10.4 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesNfa A479
CrossesBranch
Location4.6 MI SE JCT I40&SR152
RouteCounty Highway 479
CountyMadison County
StateTennessee
Coordinates35.65194, -88.61577
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 rating38.6 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans2
Design loadH 10
Structure length34 ft (10.4 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2020)
Projected traffic496 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$250,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A479 over Branch built?

It was built in 1974, making it 51 years old in 2025.

What condition is Nfa A479 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 2023.

How much traffic does Nfa A479 over Branch carry?

About 310 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A479 over Branch?

The structure is 34 ft (10.4 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Nfa A479 over Branch?

It is owned by the County Highway Agency.