US Bridges

I81 over SR 34

Fair

Greene County, Tennessee · 5.48M.FROM Hamblen Co.Ln · Structure no. 30I00810015

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
234 ft
2 main spans
Daily traffic
44,318
2021 count
Owner
State
State Highway Agency

About this bridge

I81 over SR 34 is a steel continuous stringer/multi-beam or girder carrying I81 over SR 34 in Greene County, Tennessee. It was built in 1970, so it is 55 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 70,909 by 2042. The structure is 234 ft (71.4 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI81
CrossesSR 34
Location5.48M.FROM Hamblen Co.Ln
RouteInterstate 81
CountyGreene County
StateTennessee
Coordinates36.224, -83.0398
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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length234 ft (71.4 m)
Longest span120 ft (36.6 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,318 (2021)
Projected traffic70,909 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 SR 34 built?

It was built in 1970, making it 55 years old in 2025.

What condition is I81 over SR 34 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 I81 over SR 34 carry?

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

How long is I81 over SR 34?

The structure is 234 ft (71.4 m) long with a longest span of 120 ft (36.6 m) and a deck 44 ft wide.

Who owns I81 over SR 34?

It is owned by the State Highway Agency.