US Bridges

Nfa B100 over Branch

FairPosted for load

Gibson County, Tennessee · 3.4 MI SE JCT SR43&SR54 · Structure no. 270B1000001

Built
1960
65 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
30 ft
2 main spans
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa B100 over Branch is a wood or timber stringer/multi-beam or girder carrying Nfa B100 over Branch in Gibson County, Tennessee. It was built in 1960, so it is 65 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 5 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 10 vehicles a day, roughly 2% of them trucks, projected to reach 16 by 2042. The structure is 30 ft (9.1 m) long and 17 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa B100
CrossesBranch
Location3.4 MI SE JCT SR43&SR54
RouteCounty Highway 100
CountyGibson County
StateTennessee
Coordinates36.03367, -88.79836
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating16.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 10
Structure length30 ft (9.1 m)
Longest span16 ft (4.9 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic16 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$130,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B100 over Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa B100 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 July 2023.

How much traffic does Nfa B100 over Branch carry?

About 10 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa B100 over Branch?

The structure is 30 ft (9.1 m) long with a longest span of 16 ft (4.9 m) and a deck 17 ft wide.

Who owns Nfa B100 over Branch?

It is owned by the County Highway Agency.