US Bridges

I 20/I 59 over Relief

Good

Lauderdale County, Mississippi · 1.2 MI E SR 145 South · Structure no. 110005903815420

Built
1949
76 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
26 ft
1 main span
Daily traffic
41,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 20/I 59 over Relief is a concrete culvert carrying I 20/I 59 over Relief in Lauderdale County, Mississippi. It was built in 1949, so it is 76 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 41,000 vehicles a day, roughly 35% of them trucks, projected to reach 53,000 by 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 20/I 59
CrossesRelief
Location1.2 MI E SR 145 South
RouteInterstate 59
Coordinates32.36437, -88.67539
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating90.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,000 (2023)
Projected traffic53,000 by 2043
Trucks35%
Lanes on structure8
Traffic directionTwo-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$298 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I 20/I 59 over Relief built?

It was built in 1949, making it 76 years old in 2025.

What condition is I 20/I 59 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 June 2023.

How much traffic does I 20/I 59 over Relief carry?

About 41,000 vehicles per day (2023 count), of which roughly 35% are trucks.

How long is I 20/I 59 over Relief?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m).

Who owns I 20/I 59 over Relief?

It is owned by the State Highway Agency.