US Bridges

SR 18 over Rocky Creek

FairPosted for load

Clarke County, Mississippi · 6.3 MI W Al State Line · Structure no. 310001801217920

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
1 main span
Daily traffic
290
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over Rocky Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 18 over Rocky Creek in Clarke 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 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. Its operating status is: posted for load restriction.

It carries about 290 vehicles a day, roughly 11% of them trucks, projected to reach 290 by 2043. The structure is 180 ft (54.9 m) long and 29 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

Open in Google Maps
CarriesSR 18
CrossesRocky Creek
Location6.3 MI W Al State Line
RouteState Highway 18
CountyClarke County
StateMississippi
Coordinates32.08376, -88.53961
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
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 rating47.8 US tons
Inventory rating28.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+7 approach)
Design loadH 15
Structure length180 ft (54.9 m)
Longest span40 ft (12.2 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2023)
Projected traffic290 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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$396 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 18 over Rocky Creek built?

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

What condition is SR 18 over Rocky Creek 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 2023.

How much traffic does SR 18 over Rocky Creek carry?

About 290 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 18 over Rocky Creek?

The structure is 180 ft (54.9 m) long with a longest span of 40 ft (12.2 m) and a deck 29 ft wide.

Who owns SR 18 over Rocky Creek?

It is owned by the State Highway Agency.