US Bridges

I275 over I275 / Southern Rr.

Fair

Knox County, Tennessee · In Knoxville - S of I640 · Structure no. 47I02750027

Built
1989
36 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
266 ft
3 main spans
Daily traffic
60,703
2021 count
Owner
State
State Highway Agency

About this bridge

I275 over I275 / Southern Rr. is a prestressed concrete box beam or girders - single or spread carrying I275 over I275 / Southern Rr. in Knox County, Tennessee. It was built in 1989, so it is 36 years old, younger 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 60,703 vehicles a day, roughly 6% of them trucks, projected to reach 109,856 by 2041. The structure is 266 ft (81 m) long and 120 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesI275
CrossesI275 / Southern Rr.
LocationIn Knoxville - S of I640
RouteInterstate 275
CountyKnox County
StateTennessee
Coordinates35.9876, -83.94959
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length266 ft (81 m)
Longest span90 ft (27.5 m)
Deck width120 ft (36.6 m)
Roadway width115 ft (35.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,703 (2021)
Projected traffic109,856 by 2041
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I275 over I275 / Southern Rr. built?

It was built in 1989, making it 36 years old in 2025.

What condition is I275 over I275 / Southern Rr. 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 October 2024.

How much traffic does I275 over I275 / Southern Rr. carry?

About 60,703 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I275 over I275 / Southern Rr.?

The structure is 266 ft (81 m) long with a longest span of 90 ft (27.5 m) and a deck 120 ft wide.

Who owns I275 over I275 / Southern Rr.?

It is owned by the State Highway Agency.