US Bridges

I81 over Bent Creek

Fair

Hamblen County, Tennessee · 8.46 M FR Jefferson CO LN · Structure no. 32I00810036

Built
1972
53 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
293 ft
5 main spans
Daily traffic
44,318
2021 count
Owner
State
State Highway Agency

About this bridge

I81 over Bent Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying I81 over Bent Creek in Hamblen County, Tennessee. It was built in 1972, so it is 53 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.

It carries about 44,318 vehicles a day, roughly 6% of them trucks, projected to reach 62,112 by 2041. The structure is 293 ft (89.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI81
CrossesBent Creek
Location8.46 M FR Jefferson CO LN
RouteInterstate 81
Coordinates36.19692, -83.15757
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating28.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length293 ft (89.3 m)
Longest span60 ft (18.4 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,318 (2021)
Projected traffic62,112 by 2041
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I81 over Bent Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is I81 over Bent Creek 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 March 2024.

How much traffic does I81 over Bent Creek carry?

About 44,318 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I81 over Bent Creek?

The structure is 293 ft (89.3 m) long with a longest span of 60 ft (18.4 m) and a deck 42 ft wide.

Who owns I81 over Bent Creek?

It is owned by the State Highway Agency.