US Bridges

Nfa A170 over Branch

Fair

Weakley County, Tennessee · 1 MI E of SR118 · Structure no. 920A1700001

Built
2011
14 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A170 over Branch is a prestressed concrete box beam or girders - single or spread carrying Nfa A170 over Branch in Weakley County, Tennessee. It was built in 2011, so it is 14 years old, younger 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 20 vehicles a day, roughly 2% of them trucks, projected to reach 32 by 2040. The structure is 84 ft (25.6 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A170
CrossesBranch
Location1 MI E of SR118
RouteCounty Highway 170
CountyWeakley County
StateTennessee
Coordinates36.45443, -88.70729
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length84 ft (25.6 m)
Longest span84 ft (25.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic32 by 2040
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A170 over Branch built?

It was built in 2011, making it 14 years old in 2025.

What condition is Nfa A170 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 September 2024.

How much traffic does Nfa A170 over Branch carry?

About 20 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A170 over Branch?

The structure is 84 ft (25.6 m) long with a longest span of 84 ft (25.6 m) and a deck 27 ft wide.

Who owns Nfa A170 over Branch?

It is owned by the County Highway Agency.