US Bridges

I 55 over Yalobusha River Relief

Good

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

Built
1965
60 years old
Condition
Good
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 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 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
Coordinates33.80433, -89.83919
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 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 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.