US Bridges

LA0397 over I-10

Fair

Calcasieu Parish, Louisiana · 0.3 MI N of LA 3020 · Structure no. 071001933105711

Built
1964
61 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
290 ft
5 main spans
Daily traffic
9,291
2021 count
Owner
State
State Highway Agency

About this bridge

LA0397 over I-10 is a steel stringer/multi-beam or girder carrying LA0397 over I-10 in Calcasieu Parish, Louisiana. It was built in 1964, so it is 61 years old, older 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 9,291 vehicles a day, roughly 10% of them trucks, projected to reach 10,220 by 2041. The structure is 290 ft (88.4 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLA0397
CrossesI-10
Location0.3 MI N of LA 3020
RouteState Highway 397
CountyCalcasieu Parish
StateLouisiana
Coordinates30.24418, -93.12942
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length290 ft (88.4 m)
Longest span75 ft (22.9 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,291 (2021)
Projected traffic10,220 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 LA0397 over I-10 built?

It was built in 1964, making it 61 years old in 2025.

What condition is LA0397 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 November 2024.

How much traffic does LA0397 over I-10 carry?

About 9,291 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0397 over I-10?

The structure is 290 ft (88.4 m) long with a longest span of 75 ft (22.9 m) and a deck 34 ft wide.

Who owns LA0397 over I-10?

It is owned by the State Highway Agency.