Structure 610330142905911 · Ascension County, LA

New River Canal RD over Drainage Bayou

Carries New River Canal RD over Drainage Bayou, 1.3 Mi. S. Dutchtown.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

60 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.

Built200125 years old
Length60.0 ft18.3 m
Daily traffic100counted 2019
Last inspectedApril 2023every 24 months

Location

StateLouisiana
CountyAscension
Location1.3 Mi. S. Dutchtown
CarriesNew River Canal RD
CrossesDrainage Bayou
Coordinates30.23590, -90.98594

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length60.0 ft (18.3 m)
Max Span20.0 ft (6.1 m)
Deck Width26.2 ft (8 m)
Deck Area146.4 sq m
Main Spans3
Year Built2001

Traffic

Avg Daily Traffic100 (2019)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number610330142905911

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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