Structure 40800830300001 · Bossier County, LA

La0002 over Red River-millers Bluff

Carries La0002 over Red River-millers Bluff, 3.3 Mi East Of US 71.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,100 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 5/9

3,100 ft end to end, longest span 360 ft: about 8.6 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 through truss.

Built1955rebuilt 1992
Length3100.1 ft944.9 m
Daily traffic2,059counted 2021
Last inspectedJuly 2023every 24 months

Location

StateLouisiana
CountyBossier
Location3.3 Mi East Of US 71
CarriesLa0002
CrossesRed River-millers Bluff
Coordinates32.89309, -93.82362

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length3100.1 ft (944.9 m)
Max Span359.9 ft (109.7 m)
Deck Width28.9 ft (8.8 m)
Deck Area8315.1 sq m
Main Spans5
Year Built1955 (reconstructed 1992)

Traffic

Avg Daily Traffic2,059 (2021)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number040800830300001

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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