US Bridges

LA0108 over I-10

Fair

Calcasieu Parish, Louisiana · 0.4 MI S of Williams RD · Structure no. 071001920100101

Built
1966
59 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
512 ft
7 main spans
Daily traffic
762
2021 count
Owner
State
State Highway Agency

About this bridge

LA0108 over I-10 is a steel stringer/multi-beam or girder carrying LA0108 over I-10 in Calcasieu Parish, Louisiana. It was built in 1966, so it is 59 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 5 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 762 vehicles a day, roughly 17% of them trucks, projected to reach 838 by 2041. The structure is 512 ft (156.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0108
CrossesI-10
Location0.4 MI S of Williams RD
RouteState Highway 108
CountyCalcasieu Parish
StateLouisiana
Coordinates30.18461, -93.56745
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length512 ft (156.1 m)
Longest span110 ft (33.5 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic762 (2021)
Projected traffic838 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0108 over I-10 built?

It was built in 1966, making it 59 years old in 2025.

What condition is LA0108 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 LA0108 over I-10 carry?

About 762 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0108 over I-10?

The structure is 512 ft (156.1 m) long with a longest span of 110 ft (33.5 m) and a deck 33 ft wide.

Who owns LA0108 over I-10?

It is owned by the State Highway Agency.