Structure 83500343002211 · Natchitoches County, LA

La0001 over Old River

Carries La0001 over Old River, 2.21 Mi W Of Jct La 1.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT240 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

240 ft end to end, longest span 20 ft: about 3 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.

Built197254 years old
Length240.2 ft73.2 m
Daily traffic4,740counted 2021
Last inspectedFebruary 2024every 24 months

Location

StateLouisiana
CountyNatchitoches
Location2.21 Mi W Of Jct La 1
CarriesLa0001
CrossesOld River
Coordinates31.72824, -93.10870

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length240.2 ft (73.2 m)
Max Span20.0 ft (6.1 m)
Deck Width46.9 ft (14.3 m)
Deck Area1046.8 sq m
Main Spans12
Year Built1972

Traffic

Avg Daily Traffic4,740 (2021)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number083500343002211

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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