US Bridges

SR 18 over Relief

Good

Jasper County, Mississippi · 3.1 MI E SR 15 · Structure no. 310001803112740

Built
1980
45 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
242 ft
6 main spans
Daily traffic
820
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Relief is a prestressed concrete stringer/multi-beam or girder carrying SR 18 over Relief in Jasper County, Mississippi. It was built in 1980, so it is 45 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 820 vehicles a day, roughly 14% of them trucks, projected to reach 820 by 2043. The structure is 242 ft (73.8 m) long and 41 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesSR 18
CrossesRelief
Location3.1 MI E SR 15
RouteState Highway 18
Coordinates32.00116, -89.24393
Functional classRural Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.9 US tons
Inventory rating35.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span40 ft (12.2 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2023)
Projected traffic820 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 18 over Relief built?

It was built in 1980, making it 45 years old in 2025.

What condition is SR 18 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 March 2023.

How much traffic does SR 18 over Relief carry?

About 820 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 18 over Relief?

The structure is 242 ft (73.8 m) long with a longest span of 40 ft (12.2 m) and a deck 41 ft wide.

Who owns SR 18 over Relief?

It is owned by the State Highway Agency.