US Bridges

I55-LL 297569P over Cnic Railroad

Fair

Shelby County, Tennessee · I-55 S.B. · Structure no. 79I00550068

Built
2012
13 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
1 main span
Daily traffic
72,252
2021 count
Owner
State
State Highway Agency

About this bridge

I55-LL 297569P over Cnic Railroad is a steel stringer/multi-beam or girder carrying I55-LL 297569P over Cnic Railroad in Shelby County, Tennessee. It was built in 2012, so it is 13 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 72,252 vehicles a day, roughly 8% of them trucks, projected to reach 102,400 by 2040. The structure is 187 ft (56.9 m) long and 89 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI55-LL 297569P
CrossesCnic Railroad
LocationI-55 S.B.
RouteInterstate 55
CountyShelby County
StateTennessee
Coordinates35.08528, -90.07577
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length187 ft (56.9 m)
Longest span187 ft (56.9 m)
Deck width89 ft (27.1 m)
Roadway width87 ft (26.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,252 (2021)
Projected traffic102,400 by 2040
Trucks8%
Lanes on structure5
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 I55-LL 297569P over Cnic Railroad built?

It was built in 2012, making it 13 years old in 2025.

What condition is I55-LL 297569P over Cnic 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 December 2024.

How much traffic does I55-LL 297569P over Cnic Railroad carry?

About 72,252 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I55-LL 297569P over Cnic Railroad?

The structure is 187 ft (56.9 m) long with a longest span of 187 ft (56.9 m) and a deck 89 ft wide.

Who owns I55-LL 297569P over Cnic Railroad?

It is owned by the State Highway Agency.