US Bridges

SR 1 over Black Bayou

Fair

Washington County, Mississippi · 4.9 MI N US 82 · Structure no. 310000107607040

Built
1999
26 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
45 ft
2 main spans
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

SR 1 over Black Bayou is a concrete culvert carrying SR 1 over Black Bayou in Washington County, Mississippi. It was built in 1999, so it is 26 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 1,800 vehicles a day, roughly 9% of them trucks, projected to reach 1,800 by 2043. The structure is 45 ft (13.6 m) long. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSR 1
CrossesBlack Bayou
Location4.9 MI N US 82
RouteState Highway 1
Coordinates33.46645, -91.05274
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 rating54.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length45 ft (13.6 m)
Longest span22 ft (6.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic1,800 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 1 over Black Bayou built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR 1 over Black Bayou 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 December 2024.

How much traffic does SR 1 over Black Bayou carry?

About 1,800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 1 over Black Bayou?

The structure is 45 ft (13.6 m) long with a longest span of 22 ft (6.8 m).

Who owns SR 1 over Black Bayou?

It is owned by the State Highway Agency.