Structure 83500090501041 · Natchitoches County, LA

Us0071 over Chevreuille B.

Carries Us0071 over Chevreuille B., 1.7 Mi. N Of Int La477.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT80 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

80 ft end to end, longest span 20 ft. Lengths and the car 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.

Built195670 years old
Length80.1 ft24.4 m
Daily traffic1,691counted 2021
Last inspectedJanuary 2024every 24 months

Location

StateLouisiana
CountyNatchitoches
Location1.7 Mi. N Of Int La477
CarriesUs0071
CrossesChevreuille B.
Coordinates31.77143, -92.98590

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length80.1 ft (24.4 m)
Max Span20.0 ft (6.1 m)
Deck Width33.5 ft (10.2 m)
Deck Area248.9 sq m
Main Spans4
Year Built1956

Traffic

Avg Daily Traffic1,691 (2021)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number083500090501041

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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