US Bridges

SR 18 over US 45

Good

Clarke County, Mississippi · SR 18 over US 45 · Structure no. 310001801216990

Built
1998
27 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
313 ft
4 main spans
Daily traffic
790
2023 count
Owner
State
State Highway Agency

About this bridge

SR 18 over US 45 is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 18 over US 45 in Clarke County, Mississippi. It was built in 1998, so it is 27 years old, younger than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 790 vehicles a day, roughly 11% of them trucks, projected to reach 790 by 2043. The structure is 313 ft (95.5 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 18
CrossesUS 45
LocationSR 18 over US 45
RouteState Highway 18
Coordinates32.05929, -88.67882
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length313 ft (95.5 m)
Longest span88 ft (26.8 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic790 (2023)
Projected traffic790 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 18 over US 45 built?

It was built in 1998, making it 27 years old in 2025.

What condition is SR 18 over US 45 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does SR 18 over US 45 carry?

About 790 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is SR 18 over US 45?

The structure is 313 ft (95.5 m) long with a longest span of 88 ft (26.8 m) and a deck 59 ft wide.

Who owns SR 18 over US 45?

It is owned by the State Highway Agency.