US Bridges

SR 18/SR 145 over KCS RR

FairPosted for load

Clarke County, Mississippi · 1.4 MI N SR 18 W · Structure no. 210004501204650

Built
1940
85 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,068 ft
1 main span
Daily traffic
5,700
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18/SR 145 over KCS RR is a steel stringer/multi-beam or girder carrying SR 18/SR 145 over KCS RR in Clarke County, Mississippi. It was built in 1940, so it is 85 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 1,068 ft (325.5 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSR 18/SR 145
CrossesKCS RR
Location1.4 MI N SR 18 W
RouteState Highway 145
CountyClarke County
StateMississippi
Coordinates32.02087, -88.73003
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.4 US tons
Inventory rating25.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+25 approach)
Design loadH 15
Structure length1,068 ft (325.5 m)
Longest span68 ft (20.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 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
CrossesRailroad
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
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 18/SR 145 over KCS RR built?

It was built in 1940, making it 85 years old in 2025.

What condition is SR 18/SR 145 over KCS RR 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 KCS RR carry?

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

How long is SR 18/SR 145 over KCS RR?

The structure is 1,068 ft (325.5 m) long with a longest span of 68 ft (20.7 m) and a deck 27 ft wide.

Who owns SR 18/SR 145 over KCS RR?

It is owned by the State Highway Agency.