US Bridges

I 20/I 59 over SR 145

Fair

Lauderdale County, Mississippi · I 20/I 59 over SR 145 · Structure no. 11000590381530B

Built
1957
68 years old, rebuilt 1973
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
160 ft
1 main span
Daily traffic
56,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 20/I 59 over SR 145 is a steel stringer/multi-beam or girder carrying I 20/I 59 over SR 145 in Lauderdale County, Mississippi. It was built in 1957 and reconstructed in 1973, so it is 68 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.

It carries about 56,000 vehicles a day, roughly 27% of them trucks, projected to reach 72,000 by 2043. The structure is 160 ft (48.8 m) long and 99 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 20/I 59
CrossesSR 145
LocationI 20/I 59 over SR 145
RouteInterstate 59
CountyLauderdale County
StateMississippi
Coordinates32.35323, -88.69134
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating29.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span80 ft (24.4 m)
Deck width99 ft (30.1 m)
Roadway width93 ft (28.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,000 (2023)
Projected traffic72,000 by 2043
Trucks27%
Lanes on structure6
Traffic directionTwo-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 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 I 20/I 59 over SR 145 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1973.

What condition is I 20/I 59 over SR 145 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 June 2023.

How much traffic does I 20/I 59 over SR 145 carry?

About 56,000 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is I 20/I 59 over SR 145?

The structure is 160 ft (48.8 m) long with a longest span of 80 ft (24.4 m) and a deck 99 ft wide.

Who owns I 20/I 59 over SR 145?

It is owned by the State Highway Agency.