US Bridges

US 49 over Unnamed Stream

Fair

Simpson County, Mississippi · 0.4 MI N SR 540 · Structure no. 210004906412570

Built
1961
64 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
40 ft
2 main spans
Daily traffic
21,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 49 over Unnamed Stream is a concrete culvert carrying US 49 over Unnamed Stream in Simpson County, Mississippi. It was built in 1961, so it is 64 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 21,000 vehicles a day, roughly 24% of them trucks, projected to reach 27,000 by 2043. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 49
CrossesUnnamed Stream
Location0.4 MI N SR 540
RouteU.S. Route 49
CountySimpson County
StateMississippi
Coordinates31.96178, -89.85342
Functional classRural Principal Arterial - Other

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 inspectionApril 2023
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 rating89.1 US tons
Inventory rating53.4 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 traffic21,000 (2023)
Projected traffic27,000 by 2043
Trucks24%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$700 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 49 over Unnamed Stream built?

It was built in 1961, making it 64 years old in 2025.

What condition is US 49 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 April 2023.

How much traffic does US 49 over Unnamed Stream carry?

About 21,000 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is US 49 over Unnamed Stream?

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

Who owns US 49 over Unnamed Stream?

It is owned by the State Highway Agency.