US Bridges

I0059 over West Pearl River

Fair

St. Tammany Parish, Louisiana · 5.2 MI No I-10 & I-59 Int · Structure no. 625204530105241

Built
1997
28 years old
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
2,645 ft
3 main spans
Daily traffic
36,841
2021 count
Owner
State
State Highway Agency

About this bridge

I0059 over West Pearl River is a steel girder and floorbeam system carrying I0059 over West Pearl River in St. Tammany Parish, Louisiana. It was built in 1997, so it is 28 years old, younger than the Louisiana average of 43 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 36,841 vehicles a day, roughly 25% of them trucks, projected to reach 40,525 by 2041. The structure is 2,645 ft (806.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0059
CrossesWest Pearl River
Location5.2 MI No I-10 & I-59 Int
RouteInterstate 59
CountySt. Tammany Parish
StateLouisiana
Coordinates30.38003, -89.7383
Functional classRural 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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating36 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+19 approach)
Design loadHS 20
Structure length2,645 ft (806.2 m)
Longest span175 ft (53.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,841 (2021)
Projected traffic40,525 by 2041
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I0059 over West Pearl River built?

It was built in 1997, making it 28 years old in 2025.

What condition is I0059 over West Pearl River 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 July 2023.

How much traffic does I0059 over West Pearl River carry?

About 36,841 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0059 over West Pearl River?

The structure is 2,645 ft (806.2 m) long with a longest span of 175 ft (53.3 m) and a deck 43 ft wide.

Who owns I0059 over West Pearl River?

It is owned by the State Highway Agency.