Structure 23829356895431 · Plaquemines County, LA

Hermitage RD over Deer Range Canal

Carries Hermitage RD over Deer Range Canal, 3.0 Mi. West Of La. 23.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT76 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

76 ft end to end, longest span 19 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.

Built199729 years old
Length76.1 ft23.2 m
Last inspectedJanuary 2023every 24 months

Location

StateLouisiana
CountyPlaquemines
Location3.0 Mi. West Of La. 23
CarriesHermitage RD
CrossesDeer Range Canal
Coordinates29.59543, -89.90639

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length76.1 ft (23.2 m)
Max Span19.0 ft (5.8 m)
Deck Width30.5 ft (9.3 m)
Deck Area215.8 sq m
Main Spans4
Year Built1997

Traffic

Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number023829356895431

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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