US Bridges

US 51 over Unnamed Stream

Poor

Copiah County, Mississippi · 2.7 MI N SR 28 · Structure no. 210005101506680

Built
1934
91 years old
Condition
Poor
inspected August 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 over Unnamed Stream is a concrete tee beam carrying US 51 over Unnamed Stream in Copiah County, Mississippi. It was built in 1934, so it is 91 years old, older than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,300 vehicles a day, roughly 11% of them trucks, projected to reach 4,300 by 2043. The structure is 28 ft (8.5 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS 51
CrossesUnnamed Stream
Location2.7 MI N SR 28
RouteU.S. Route 51
Coordinates31.91228, -90.40035
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.1 US tons
Inventory rating34.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span23 ft (7 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic4,300 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$337 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 51 over Unnamed Stream built?

It was built in 1934, making it 91 years old in 2025.

What condition is US 51 over Unnamed Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does US 51 over Unnamed Stream carry?

About 4,300 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 51 over Unnamed Stream?

The structure is 28 ft (8.5 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns US 51 over Unnamed Stream?

It is owned by the State Highway Agency.