US Bridges

US 98 over Slough

Good

Marion County, Mississippi · 0.6 MI W SR 13 South · Structure no. 21000980461193A

Built
1983
42 years old
Condition
Good
inspected January 2024
Type
Slab
Concrete
Length
448 ft
22 main spans
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 98 over Slough is a concrete slab carrying US 98 over Slough in Marion County, Mississippi. It was built in 1983, so it is 42 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 7,500 vehicles a day, roughly 10% of them trucks, projected to reach 7,500 by 2043. The structure is 448 ft (136.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 98
CrossesSlough
Location0.6 MI W SR 13 South
RouteU.S. Route 98
Coordinates31.23438, -89.83367
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating65 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans22
Design loadHS 20
Structure length448 ft (136.6 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic7,500 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US 98 over Slough built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 98 over Slough 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 January 2024.

How much traffic does US 98 over Slough carry?

About 7,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is US 98 over Slough?

The structure is 448 ft (136.6 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns US 98 over Slough?

It is owned by the State Highway Agency.