US Bridges

Sandpit Road over Silver Bayou

FairPosted for load

Bolivar County, Mississippi · Sec 29 T21N R 5W · Structure no. SA0600000000030

Built
1970
55 years old
Condition
Fair
inspected January 2025
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
150
2015 count
Owner
County
County Highway Agency

About this bridge

Sandpit Road over Silver Bayou is a concrete channel beam carrying Sandpit Road over Silver Bayou in Bolivar County, Mississippi. It was built in 1970, so it is 55 years old, older 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 8% of them trucks, projected to reach 225 by 2035. The structure is 38 ft (11.6 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSandpit Road
CrossesSilver Bayou
LocationSec 29 T21N R 5W
RouteCounty Highway 450
Coordinates33.63097, -90.74044
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2015)
Projected traffic225 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$127,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Sandpit Road over Silver Bayou built?

It was built in 1970, making it 55 years old in 2025.

What condition is Sandpit Road over Silver 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 January 2025.

How much traffic does Sandpit Road over Silver Bayou carry?

About 150 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is Sandpit Road over Silver Bayou?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Sandpit Road over Silver Bayou?

It is owned by the County Highway Agency.