Structure 40804510204237 · Bossier County, LA

I0020 over Macks Bayou

Carries I0020 over Macks Bayou, 0.1 Mi S Of I-20.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT155 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

155 ft end to end, longest span 80 ft: about 2 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 slab bridge.

Built200719 years old
Length154.9 ft47.2 m
Daily traffic23,105counted 2021
Last inspectedNovember 2024every 24 months

Location

StateLouisiana
CountyBossier
Location0.1 Mi S Of I-20
CarriesI0020
CrossesMacks Bayou
Coordinates32.52783, -93.67542

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length154.9 ft (47.2 m)
Max Span80.1 ft (24.4 m)
Deck Width38.4 ft (11.7 m)
Deck Area552.2 sq m
Main Spans7
Year Built2007

Traffic

Avg Daily Traffic23,105 (2021)
Truck Traffic19%
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number040804510204237

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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