Structure 610402320113011 · Assumption County, LA

La0070 over Pierre Pass

Carries La0070 over Pierre Pass, 3.0 Miles N. Of La 101.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT476 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

476 ft end to end, longest span 98 ft: about 7 semi-trucks nose to tail. 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 swing bridge (drawn closed).

Built196759 years old
Length476.0 ft145.1 m
Daily traffic5,560counted 2021
Last inspectedJune 2023every 24 months

Location

StateLouisiana
CountyAssumption
Location3.0 Miles N. Of La 101
CarriesLa0070
CrossesPierre Pass
Coordinates29.96449, -91.21015

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length476.0 ft (145.1 m)
Max Span98.1 ft (29.9 m)
Deck Width39.4 ft (12 m)
Deck Area1741.2 sq m
Main Spans2
Year Built1967

Traffic

Avg Daily Traffic5,560 (2021)
Truck Traffic18%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number610402320113011

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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