US Bridges

I81 over Nfa B352

Fair

Sullivan County, Tennessee · .6 M NE of Washington Cl · Structure no. 82I00810002

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
109 ft
3 main spans
Daily traffic
53,763
2021 count
Owner
State
State Highway Agency

About this bridge

I81 over Nfa B352 is a prestressed concrete continuous stringer/multi-beam or girder carrying I81 over Nfa B352 in Sullivan County, Tennessee. It was built in 1968, so it is 57 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 53,763 vehicles a day, roughly 6% of them trucks, projected to reach 86,021 by 2042. The structure is 109 ft (33.2 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI81
CrossesNfa B352
Location.6 M NE of Washington Cl
RouteInterstate 81
Coordinates36.43333, -82.56333
Functional classRural Principal Arterial - Interstate

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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating32.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length109 ft (33.2 m)
Longest span45 ft (13.6 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,763 (2021)
Projected traffic86,021 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I81 over Nfa B352 built?

It was built in 1968, making it 57 years old in 2025.

What condition is I81 over Nfa B352 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 August 2024.

How much traffic does I81 over Nfa B352 carry?

About 53,763 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I81 over Nfa B352?

The structure is 109 ft (33.2 m) long with a longest span of 45 ft (13.6 m) and a deck 44 ft wide.

Who owns I81 over Nfa B352?

It is owned by the State Highway Agency.