US Bridges

US 49 over Conway Slough

Good

Rankin County, Mississippi · 0.4 MI S I 20 · Structure no. 210004906115530

Built
1967
58 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
43 ft
4 main spans
Daily traffic
56,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 49 over Conway Slough is a concrete culvert carrying US 49 over Conway Slough in Rankin County, Mississippi. It was built in 1967, so it is 58 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 56,000 vehicles a day, roughly 15% of them trucks, projected to reach 56,000 by 2043. The structure is 43 ft (13 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 49
CrossesConway Slough
Location0.4 MI S I 20
RouteU.S. Route 49
Coordinates32.26694, -90.1603
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating73 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,000 (2023)
Projected traffic56,000 by 2043
Trucks15%
Lanes on structure9
Traffic directionTwo-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 49 over Conway Slough built?

It was built in 1967, making it 58 years old in 2025.

What condition is US 49 over Conway 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 November 2024.

How much traffic does US 49 over Conway Slough carry?

About 56,000 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 49 over Conway Slough?

The structure is 43 ft (13 m) long with a longest span of 10 ft (3 m).

Who owns US 49 over Conway Slough?

It is owned by the State Highway Agency.