US Bridges

I75 Ll over I75 - Ll / CSX Railroad

Good

Knox County, Tennessee · In Knoxville · Structure no. 47I00750110

Built
1981
44 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
280 ft
3 main spans
Daily traffic
90,947
2021 count
Owner
State
State Highway Agency

About this bridge

I75 Ll over I75 - Ll / CSX Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I75 Ll over I75 - Ll / CSX Railroad in Knox County, Tennessee. It was built in 1981, so it is 44 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90,947 vehicles a day, roughly 6% of them trucks, projected to reach 156,064 by 2041. The structure is 280 ft (85.2 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI75 Ll
CrossesI75 - Ll / CSX Railroad
LocationIn Knoxville
RouteInterstate 75
Coordinates35.96913, -83.9798
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length280 ft (85.2 m)
Longest span99 ft (30.3 m)
Deck width61 ft (18.6 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90,947 (2021)
Projected traffic156,064 by 2041
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I75 Ll over I75 - Ll / CSX Railroad built?

It was built in 1981, making it 44 years old in 2025.

What condition is I75 Ll over I75 - Ll / CSX Railroad in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does I75 Ll over I75 - Ll / CSX Railroad carry?

About 90,947 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I75 Ll over I75 - Ll / CSX Railroad?

The structure is 280 ft (85.2 m) long with a longest span of 99 ft (30.3 m) and a deck 61 ft wide.

Who owns I75 Ll over I75 - Ll / CSX Railroad?

It is owned by the State Highway Agency.