US Bridges

SR 27 over Unnamed Stream

Fair

Walthall County, Mississippi · 2.0 MI S SR 48/SR 198 · Structure no. 310002707400720

Built
1976
49 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
40 ft
2 main spans
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

SR 27 over Unnamed Stream is a concrete culvert carrying SR 27 over Unnamed Stream in Walthall County, Mississippi. It was built in 1976, so it is 49 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.

It carries about 3,400 vehicles a day, roughly 14% of them trucks, projected to reach 3,400 by 2043. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 49.7 mi (80 km).

CarriesSR 27
CrossesUnnamed Stream
Location2.0 MI S SR 48/SR 198
RouteState Highway 27
Coordinates31.09343, -90.16005
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic3,400 by 2043
Trucks14%
Lanes on structure20
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 27 over Unnamed Stream built?

It was built in 1976, making it 49 years old in 2025.

What condition is SR 27 over Unnamed Stream 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 August 2024.

How much traffic does SR 27 over Unnamed Stream carry?

About 3,400 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 27 over Unnamed Stream?

The structure is 40 ft (12.2 m) long with a longest span of 16 ft (4.9 m).

Who owns SR 27 over Unnamed Stream?

It is owned by the State Highway Agency.