US Bridges

Lampton ST over Mound Bayou

Good

Bolivar County, Mississippi · Sec 33 T24N R 5W · Structure no. SA060000000A197

Built
2022
3 years old
Condition
Good
inspected October 2024
Type
Channel Beam
Concrete
Length
78 ft
3 main spans
Daily traffic
600
2024 count
Owner
County
County Highway Agency

About this bridge

Lampton ST over Mound Bayou is a concrete channel beam carrying Lampton ST over Mound Bayou in Bolivar County, Mississippi. It was built in 2022, so it is 3 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 600 vehicles a day, roughly 8% of them trucks, projected to reach 900 by 2044. The structure is 78 ft (23.8 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLampton ST
CrossesMound Bayou
LocationSec 33 T24N R 5W
RouteCity Street 820
Coordinates33.88326, -90.72701
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length78 ft (23.8 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2024)
Projected traffic900 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lampton ST over Mound Bayou built?

It was built in 2022, making it 3 years old in 2025.

What condition is Lampton ST over Mound 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 October 2024.

How much traffic does Lampton ST over Mound Bayou carry?

About 600 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Lampton ST over Mound Bayou?

The structure is 78 ft (23.8 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Lampton ST over Mound Bayou?

It is owned by the County Highway Agency.