US Bridges

Nfa A164 over I81

Fair

Washington County, Tennessee · NE of SR 93 & I81 JCT · Structure no. 90I00810005

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
313 ft
5 main spans
Daily traffic
250
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa A164 over I81 is a concrete continuous tee beam carrying Nfa A164 over I81 in Washington 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.

It carries about 250 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2042. The structure is 313 ft (95.4 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A164
CrossesI81
LocationNE of SR 93 & I81 JCT
RouteCounty Highway 164
CountyWashington County
StateTennessee
Coordinates36.41167, -82.59333
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating31.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length313 ft (95.4 m)
Longest span88 ft (26.8 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic400 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A164 over I81 built?

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

What condition is Nfa A164 over I81 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 2023.

How much traffic does Nfa A164 over I81 carry?

About 250 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A164 over I81?

The structure is 313 ft (95.4 m) long with a longest span of 88 ft (26.8 m) and a deck 32 ft wide.

Who owns Nfa A164 over I81?

It is owned by the State Highway Agency.