Structure 40804510201416 · Bossier County, LA

I0020 over Us71&kcsrr

Carries I0020 over Us71&kcsrr, Ramps For US 71.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT544 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 6/9Substructure 6/9

544 ft end to end, longest span 70 ft: about 1.5 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 multi-beam bridge.

Built196660 years old
Length544.0 ft165.8 m
Daily traffic23,105counted 2021
Last inspectedNovember 2023every 24 months

Location

StateLouisiana
CountyBossier
LocationRamps For US 71
CarriesI0020
CrossesUs71&kcsrr
Coordinates32.51511, -93.71570

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length544.0 ft (165.8 m)
Max Span69.9 ft (21.3 m)
Deck Width33.5 ft (10.2 m)
Deck Area1691.2 sq m
Main Spans10
Year Built1966

Traffic

Avg Daily Traffic23,105 (2021)
Truck Traffic19%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number040804510201416

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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