US Bridges

I 55 over SR 304

Fair

DeSoto County, Mississippi · I 55 over SR 304 · Structure no. 11000550172801B

Built
1959
66 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
19,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over SR 304 is a concrete continuous box beam or girders - single or spread carrying I 55 over SR 304 in DeSoto County, Mississippi. It was built in 1959, so it is 66 years old, older than the Mississippi average of 38.9 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 19,000 vehicles a day, roughly 14% of them trucks, projected to reach 25,000 by 2043. The structure is 162 ft (49.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 55
CrossesSR 304
LocationI 55 over SR 304
RouteInterstate 55
Coordinates34.82368, -89.97596
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating28 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span67 ft (20.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,000 (2023)
Projected traffic25,000 by 2043
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$173 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 55 over SR 304 built?

It was built in 1959, making it 66 years old in 2025.

What condition is I 55 over SR 304 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 May 2024.

How much traffic does I 55 over SR 304 carry?

About 19,000 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I 55 over SR 304?

The structure is 162 ft (49.4 m) long with a longest span of 67 ft (20.4 m) and a deck 30 ft wide.

Who owns I 55 over SR 304?

It is owned by the State Highway Agency.