Structure 23604509010711 · Orleans County, LA

I0010 over Dwyer Canal/dwyer RD

Carries I0010 over Dwyer Canal/dwyer RD, .7 Mi East Of US 90.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,234 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,234 ft end to end, longest span 127 ft: about 3.4 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.

Built196759 years old
Length1233.9 ft376.1 m
Daily traffic121,599counted 2021
Last inspectedJuly 2023every 24 months

Location

StateLouisiana
CountyOrleans
Location.7 Mi East Of US 90
CarriesI0010
CrossesDwyer Canal/dwyer RD
Coordinates30.01882, -90.01360

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1233.9 ft (376.1 m)
Max Span127.0 ft (38.7 m)
Deck Width44.3 ft (13.5 m)
Deck Area5077.4 sq m
Main Spans3
Year Built1967

Traffic

Avg Daily Traffic121,599 (2021)
Truck Traffic25%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number023604509010711

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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