US Bridges

SR 393 over Big Slough Trib

Fair

Winston County, Mississippi · 0.7 MI S SR 490 · Structure no. 310039308000390

Built
2004
21 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
280
2023 count
Owner
State
State Highway Agency

About this bridge

SR 393 over Big Slough Trib is a concrete culvert carrying SR 393 over Big Slough Trib in Winston County, Mississippi. It was built in 2004, so it is 21 years old, younger than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 280 vehicles a day, roughly 11% of them trucks, projected to reach 280 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesSR 393
CrossesBig Slough Trib
Location0.7 MI S SR 490
RouteState Highway 393
CountyWinston County
StateMississippi
Coordinates32.96656, -88.9639
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating36.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2023)
Projected traffic280 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 393 over Big Slough Trib built?

It was built in 2004, making it 21 years old in 2025.

What condition is SR 393 over Big Slough Trib in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does SR 393 over Big Slough Trib carry?

About 280 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 393 over Big Slough Trib?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns SR 393 over Big Slough Trib?

It is owned by the State Highway Agency.