US Bridges

I 59 over SR 18

Good

Clarke County, Mississippi · I 59 over SR 18 · Structure no. 11000590121254A

Built
1965
60 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 59 over SR 18 is a prestressed concrete stringer/multi-beam or girder carrying I 59 over SR 18 in Clarke County, Mississippi. It was built in 1965, so it is 60 years old, older 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 7,000 vehicles a day, roughly 40% of them trucks, projected to reach 7,500 by 2043. The structure is 153 ft (46.6 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 59
CrossesSR 18
LocationI 59 over SR 18
RouteInterstate 59
Coordinates32.06039, -88.90427
Functional classRural Principal Arterial - Interstate

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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.4 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length153 ft (46.6 m)
Longest span51 ft (15.5 m)
Deck width33 ft (10 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic7,500 by 2043
Trucks40%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$291 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 59 over SR 18 built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 59 over SR 18 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 January 2023.

How much traffic does I 59 over SR 18 carry?

About 7,000 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is I 59 over SR 18?

The structure is 153 ft (46.6 m) long with a longest span of 51 ft (15.5 m) and a deck 33 ft wide.

Who owns I 59 over SR 18?

It is owned by the State Highway Agency.