US Bridges

SR 403 over Big Black River

Good

Webster County, Mississippi · 2.4 MI N US 82 · Structure no. 310040307800270

Built
1998
27 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete
Length
400 ft
10 main spans
Daily traffic
500
2023 count
Owner
State
State Highway Agency

About this bridge

SR 403 over Big Black River is a prestressed concrete slab carrying SR 403 over Big Black River in Webster County, Mississippi. It was built in 1998, so it is 27 years old, younger 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 500 vehicles a day, roughly 11% of them trucks, projected to reach 500 by 2043. The structure is 400 ft (122 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR 403
CrossesBig Black River
Location2.4 MI N US 82
RouteState Highway 403
Coordinates33.57492, -89.12967
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.8 US tons
Inventory rating40.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans10
Design loadHS 20
Structure length400 ft (122 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic500 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 403 over Big Black River built?

It was built in 1998, making it 27 years old in 2025.

What condition is SR 403 over Big Black River 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 August 2023.

How much traffic does SR 403 over Big Black River carry?

About 500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 403 over Big Black River?

The structure is 400 ft (122 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns SR 403 over Big Black River?

It is owned by the State Highway Agency.