US Bridges

LA3188 over I-10

Fair

St. John the Baptist Parish, Louisiana · 2.2 M N of US 61 · Structure no. 624808481502351

Built
1984
41 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,365 ft
18 main spans
Daily traffic
6,786
2021 count
Owner
State
State Highway Agency

About this bridge

LA3188 over I-10 is a prestressed concrete continuous stringer/multi-beam or girder carrying LA3188 over I-10 in St. John the Baptist Parish, Louisiana. It was built in 1984, so it is 41 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 6,786 vehicles a day, roughly 6% of them trucks, projected to reach 7,464 by 2041. The structure is 1,365 ft (416.1 m) long and 47 ft wide.

Location

Open in Google Maps
CarriesLA3188
CrossesI-10
Location2.2 M N of US 61
RouteState Highway 3188
CountySt. John the Baptist Parish
StateLouisiana
Coordinates30.10641, -90.4981
Functional classUrban Other Principal Arterial

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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length1,365 ft (416.1 m)
Longest span103 ft (31.4 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,786 (2021)
Projected traffic7,464 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 LA3188 over I-10 built?

It was built in 1984, making it 41 years old in 2025.

What condition is LA3188 over I-10 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 LA3188 over I-10 carry?

About 6,786 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is LA3188 over I-10?

The structure is 1,365 ft (416.1 m) long with a longest span of 103 ft (31.4 m) and a deck 47 ft wide.

Who owns LA3188 over I-10?

It is owned by the State Highway Agency.