US Bridges

SR 18 over Bayou Pierre River

Good

Copiah County, Mississippi · 8.5 MI W SR 27 South · Structure no. 310001801501930

Built
2019
6 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,712 ft
3 main spans
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Bayou Pierre River is a steel continuous stringer/multi-beam or girder carrying SR 18 over Bayou Pierre River in Copiah County, Mississippi. It was built in 2019, so it is 6 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 1,600 vehicles a day, roughly 13% of them trucks, projected to reach 1,600 by 2043. The structure is 1,712 ft (521.9 m) long and 47 ft wide. If it were closed, the detour would be 44.1 mi (71 km).

CarriesSR 18
CrossesBayou Pierre River
Location8.5 MI W SR 27 South
RouteState Highway 18
Coordinates32.00276, -90.69104
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating40 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+11 approach)
Design loadHL 93
Structure length1,712 ft (521.9 m)
Longest span250 ft (76.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,600 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.1 mi (71 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 18 over Bayou Pierre River built?

It was built in 2019, making it 6 years old in 2025.

What condition is SR 18 over Bayou Pierre 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 2024.

How much traffic does SR 18 over Bayou Pierre River carry?

About 1,600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SR 18 over Bayou Pierre River?

The structure is 1,712 ft (521.9 m) long with a longest span of 250 ft (76.2 m) and a deck 47 ft wide.

Who owns SR 18 over Bayou Pierre River?

It is owned by the State Highway Agency.