US Bridges

I 55 over Yalobusha River Relief

Fair

Grenada County, Mississippi · 1.3 MI N SR 7 · Structure no. 11000550222071A

Built
1965
60 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
6 main spans
Daily traffic
9,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over Yalobusha River Relief is a prestressed concrete stringer/multi-beam or girder carrying I 55 over Yalobusha River Relief in Grenada County, Mississippi. It was built in 1965, so it is 60 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 9,500 vehicles a day, roughly 30% of them trucks, projected to reach 11,000 by 2043. The structure is 240 ft (73.2 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 55
CrossesYalobusha River Relief
Location1.3 MI N SR 7
RouteInterstate 55
CountyGrenada County
StateMississippi
Coordinates33.80534, -89.84046
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length240 ft (73.2 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,500 (2023)
Projected traffic11,000 by 2043
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
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 of existing bridge without deck rehabilitation
Estimated improvement cost$246 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I 55 over Yalobusha River Relief built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 55 over Yalobusha River Relief 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 February 2024.

How much traffic does I 55 over Yalobusha River Relief carry?

About 9,500 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I 55 over Yalobusha River Relief?

The structure is 240 ft (73.2 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns I 55 over Yalobusha River Relief?

It is owned by the State Highway Agency.