US Bridges

I40-LL 309166N over I-40 W.B. / Ic Railroad

Fair

Shelby County, Tennessee · 3 MI E of SR300 JCT · Structure no. 79I00400078

Built
1976
49 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
100,331
2021 count
Owner
State
State Highway Agency

About this bridge

I40-LL 309166N over I-40 W.B. / Ic Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I40-LL 309166N over I-40 W.B. / Ic Railroad in Shelby County, Tennessee. It was built in 1976, so it is 49 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 100,331 vehicles a day, roughly 8% of them trucks, projected to reach 160,530 by 2042. The structure is 162 ft (49.4 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI40-LL 309166N
CrossesI-40 W.B. / Ic Railroad
Location3 MI E of SR300 JCT
RouteInterstate 40
CountyShelby County
StateTennessee
Coordinates35.19106, -89.96414
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.
Superstructure7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span54 ft (16.5 m)
Deck width60 ft (18.4 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100,331 (2021)
Projected traffic160,530 by 2042
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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 I40-LL 309166N over I-40 W.B. / Ic Railroad built?

It was built in 1976, making it 49 years old in 2025.

What condition is I40-LL 309166N over I-40 W.B. / Ic Railroad 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 I40-LL 309166N over I-40 W.B. / Ic Railroad carry?

About 100,331 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I40-LL 309166N over I-40 W.B. / Ic Railroad?

The structure is 162 ft (49.4 m) long with a longest span of 54 ft (16.5 m) and a deck 60 ft wide.

Who owns I40-LL 309166N over I-40 W.B. / Ic Railroad?

It is owned by the State Highway Agency.