US Bridges

US 49 over Big Black River Relief

Good

Madison County, Mississippi · 4.4 MI N SR 22 · Structure no. 21000490451830B

Built
2011
14 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
281 ft
7 main spans
Daily traffic
6,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 49 over Big Black River Relief is a prestressed concrete continuous stringer/multi-beam or girder carrying US 49 over Big Black River Relief in Madison County, Mississippi. It was built in 2011, so it is 14 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 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 6,000 vehicles a day, roughly 14% of them trucks, projected to reach 7,000 by 2043. The structure is 281 ft (85.8 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 49
CrossesBig Black River Relief
Location4.4 MI N SR 22
RouteU.S. Route 49
Coordinates32.59289, -90.35333
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length281 ft (85.8 m)
Longest span40 ft (12.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic7,000 by 2043
Trucks14%
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 49 over Big Black River Relief built?

It was built in 2011, making it 14 years old in 2025.

What condition is US 49 over Big Black River 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 May 2024.

How much traffic does US 49 over Big Black River Relief carry?

About 6,000 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 49 over Big Black River Relief?

The structure is 281 ft (85.8 m) long with a longest span of 40 ft (12.2 m) and a deck 47 ft wide.

Who owns US 49 over Big Black River Relief?

It is owned by the State Highway Agency.