US Bridges

SR 1 over Big Sunflower River

PoorPosted for load

Coahoma County, Mississippi · 10.6 MI N SR 322 · Structure no. 310000101414320

Built
1959
66 years old
Condition
Poor
inspected May 2024
Type
Tee Beam
Concrete
Length
150 ft
5 main spans
Daily traffic
890
2023 count
Owner
State
State Highway Agency

About this bridge

SR 1 over Big Sunflower River is a concrete tee beam carrying SR 1 over Big Sunflower River in Coahoma County, Mississippi. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 890 vehicles a day, roughly 7% of them trucks, projected to reach 890 by 2043. The structure is 150 ft (45.7 m) long and 28 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesSR 1
CrossesBig Sunflower River
Location10.6 MI N SR 322
RouteState Highway 1
CountyCoahoma County
StateMississippi
Coordinates34.33287, -90.61813
Functional classRural Minor Arterial

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length150 ft (45.7 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic890 (2023)
Projected traffic890 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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$454 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 1 over Big Sunflower River built?

It was built in 1959, making it 66 years old in 2025.

What condition is SR 1 over Big Sunflower River 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 May 2024.

How much traffic does SR 1 over Big Sunflower River carry?

About 890 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 1 over Big Sunflower River?

The structure is 150 ft (45.7 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns SR 1 over Big Sunflower River?

It is owned by the State Highway Agency.