US0090 over Patterson Canal

Good

St. Mary Parish, Louisiana · 2.6 MI East of LA 182 · Structure no. 035104240526011

Built: 1964; 61 years old
Condition: Good; inspected May 2023
Type: Culvert; Concrete
Length: 26 ft; 4 main spans
Daily traffic: 22,893; 2022 count
Owner: State; State Highway Agency

About this bridge

US0090 over Patterson Canal is a concrete culvert carrying US0090 over Patterson Canal in St. Mary Parish, Louisiana. It was built in 1964, so it is 61 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,893 vehicles a day, roughly 10% of them trucks, projected to reach 25,182 by 2042. The structure is 26 ft (7.9 m) long and 156 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS0090

CrossesPatterson Canal

Location2.6 MI East of LA 182

RouteU.S. Route 90

CountySt. Mary Parish

StateLouisiana

Coordinates29.69103, -91.3197

Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	7 Good	Some minor problems.

Last inspectionMay 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry9: Superior to present desirable criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating95 US tons

Inventory rating73.2 US tons

Structure

Structure typeCulvert

MaterialConcrete

DeckNot applicable

Main spans4

Design loadHS 20

Structure length26 ft (7.9 m)

Longest span6 ft (1.8 m)

Deck width156 ft (47.5 m)

Roadway width89 ft (27.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,893 (2022)

Projected traffic25,182 by 2042

Trucks10%

Lanes on structure2

Traffic directionOne-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.2 mi (2 km)

TollOn a free road

National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency

Maintained byState Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was US0090 over Patterson Canal built?

It was built in 1964, making it 61 years old in 2025.

What condition is US0090 over Patterson Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does US0090 over Patterson Canal carry?

About 22,893 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US0090 over Patterson Canal?

The structure is 26 ft (7.9 m) long with a longest span of 6 ft (1.8 m) and a deck 156 ft wide.

Who owns US0090 over Patterson Canal?

It is owned by the State Highway Agency.