US Bridges

Nfa A166 over Branch

Fair

Marshall County, Tennessee · 1 MI SE JCT SR50&SR271 · Structure no. 590A1660001

Built
1948
77 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
115
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A166 over Branch is a concrete tee beam carrying Nfa A166 over Branch in Marshall County, Tennessee. It was built in 1948, so it is 77 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 115 vehicles a day, roughly 1% of them trucks, projected to reach 184 by 2041. The structure is 27 ft (8.2 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa A166
CrossesBranch
Location1 MI SE JCT SR50&SR271
RouteCounty Highway 166
CountyMarshall County
StateTennessee
Coordinates35.40849, -86.6944
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span25 ft (7.7 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2020)
Projected traffic184 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 of existing bridge without deck rehabilitation
Estimated improvement cost$91,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A166 over Branch built?

It was built in 1948, making it 77 years old in 2025.

What condition is Nfa A166 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 2024.

How much traffic does Nfa A166 over Branch carry?

About 115 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa A166 over Branch?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.7 m) and a deck 24 ft wide.

Who owns Nfa A166 over Branch?

It is owned by the County Highway Agency.