US Bridges

Wilmot Road over Black Bayou

Good

Washington County, Mississippi · Sec 21 T17N R 7W B · Structure no. SA760000000A181

Built
2020
5 years old
Condition
Good
inspected May 2023
Type
Channel Beam
Concrete
Length
143 ft
5 main spans
Daily traffic
100
2021 count
Owner
County
County Highway Agency

About this bridge

Wilmot Road over Black Bayou is a concrete channel beam carrying Wilmot Road over Black Bayou in Washington County, Mississippi. It was built in 2020, so it is 5 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 100 vehicles a day, roughly 8% of them trucks, projected to reach 140 by 2041. The structure is 143 ft (43.6 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesWilmot Road
CrossesBlack Bayou
LocationSec 21 T17N R 7W B
RouteCounty Highway 932
Coordinates33.29851, -90.93202
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHL 93
Structure length143 ft (43.6 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic140 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilmot Road over Black Bayou built?

It was built in 2020, making it 5 years old in 2025.

What condition is Wilmot Road over Black Bayou 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 2023.

How much traffic does Wilmot Road over Black Bayou carry?

About 100 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Wilmot Road over Black Bayou?

The structure is 143 ft (43.6 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns Wilmot Road over Black Bayou?

It is owned by the County Highway Agency.