Structure 71008101204221 · Calcasieu County, LA

La0378 over W Fork Calcasieu River

Carries La0378 over W Fork Calcasieu River, 4.6 Mi N Of US 90.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT624 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

624 ft end to end: about 1.7 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a lift bridge (drawn closed).

Built196858 years old
Length624.0 ft190.2 m
Daily traffic14,767counted 2023
Last inspectedJuly 2023every 24 months

Location

StateLouisiana
CountyCalcasieu
Location4.6 Mi N Of US 90
CarriesLa0378
CrossesW Fork Calcasieu River
Coordinates30.29613, -93.24940

Physical Characteristics

MaterialSteel
DesignMovable - Lift
Total Length624.0 ft (190.2 m)
Max Span100.1 ft (30.5 m)
Deck Width33.8 ft (10.3 m)
Deck Area1959.1 sq m
Main Spans1
Year Built1968

Traffic

Avg Daily Traffic14,767 (2023)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number071008101204221

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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