US Bridges

SR 18/SR 145 over Chickasawhay River

FairPosted for load

Clarke County, Mississippi · 0.3 MI N SR 18 W · Structure no. 210004501204540

Built
1956
69 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
761 ft
1 main span
Daily traffic
5,700
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18/SR 145 over Chickasawhay River is a steel continuous stringer/multi-beam or girder carrying SR 18/SR 145 over Chickasawhay River in Clarke County, Mississippi. It was built in 1956, so it is 69 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 5 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 5,700 vehicles a day, roughly 14% of them trucks, projected to reach 5,700 by 2043. The structure is 761 ft (232 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSR 18/SR 145
CrossesChickasawhay River
Location0.3 MI N SR 18 W
RouteState Highway 145
Coordinates32.01006, -88.72969
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.2 US tons
Inventory rating25.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+12 approach)
Design loadHS 15
Structure length761 ft (232 m)
Longest span120 ft (36.6 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2023)
Projected traffic5,700 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$1,000 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 18/SR 145 over Chickasawhay River built?

It was built in 1956, making it 69 years old in 2025.

What condition is SR 18/SR 145 over Chickasawhay River 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 May 2024.

How much traffic does SR 18/SR 145 over Chickasawhay River carry?

About 5,700 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is SR 18/SR 145 over Chickasawhay River?

The structure is 761 ft (232 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.

Who owns SR 18/SR 145 over Chickasawhay River?

It is owned by the State Highway Agency.