US Bridges

I81 over Garder Creek

Fair

Greene County, Tennessee · 18.37M.FROM Hamblen Co.Ln · Structure no. 30I00810043

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
37,616
2021 count
Owner
State
State Highway Agency

About this bridge

I81 over Garder Creek is a concrete continuous culvert carrying I81 over Garder Creek 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 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 37,616 vehicles a day, roughly 6% of them trucks, projected to reach 59,901 by 2041. The structure is 34 ft (10.4 m) long and 380 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesI81
CrossesGarder Creek
Location18.37M.FROM Hamblen Co.Ln
RouteInterstate 81
Coordinates36.31763, -82.84215
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width380 ft (115.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,616 (2021)
Projected traffic59,901 by 2041
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$482,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I81 over Garder Creek built?

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

What condition is I81 over Garder 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 July 2024.

How much traffic does I81 over Garder Creek carry?

About 37,616 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I81 over Garder Creek?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 380 ft wide.

Who owns I81 over Garder Creek?

It is owned by the State Highway Agency.