US Bridges

I 20 over Relief

Good

Newton County, Mississippi · 3.6 MI E SR 503 · Structure no. 11000200511189A

Built
1962
63 years old, rebuilt 1999
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
9 main spans
Daily traffic
12,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 20 over Relief is a prestressed concrete stringer/multi-beam or girder carrying I 20 over Relief in Newton County, Mississippi. It was built in 1962 and reconstructed in 1999, so it is 63 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 12,000 vehicles a day, roughly 45% of them trucks, projected to reach 12,000 by 2043. The structure is 360 ft (109.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 20
CrossesRelief
Location3.6 MI E SR 503
RouteInterstate 20
Coordinates32.34283, -88.98051
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length360 ft (109.7 m)
Longest span40 ft (12.2 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2023)
Projected traffic12,000 by 2043
Trucks45%
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 with deck rehabilitation or replacement
Estimated improvement cost$466 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I 20 over Relief built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1999.

What condition is I 20 over 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 2023.

How much traffic does I 20 over Relief carry?

About 12,000 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I 20 over Relief?

The structure is 360 ft (109.7 m) long with a longest span of 40 ft (12.2 m) and a deck 45 ft wide.

Who owns I 20 over Relief?

It is owned by the State Highway Agency.