US Bridges

US0090 over Charenton Canal

Fair

St. Mary Parish, Louisiana · 2.05 MI W of LA 3211 · Structure no. 035104240508802

Built
1978
47 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
2,924 ft
1 main span
Daily traffic
21,000
2016 count
Owner
State
State Highway Agency

About this bridge

US0090 over Charenton Canal is a steel stringer/multi-beam or girder carrying US0090 over Charenton Canal in St. Mary Parish, Louisiana. It was built in 1978, so it is 47 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 21,000 vehicles a day, roughly 14% of them trucks, projected to reach 23,100 by 2036. The structure is 2,924 ft (891.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0090
CrossesCharenton Canal
Location2.05 MI W of LA 3211
RouteU.S. Route 90
CountySt. Mary Parish
StateLouisiana
Coordinates29.81632, -91.5424
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+36 approach)
Design loadHS 20
Structure length2,924 ft (891.2 m)
Longest span150 ft (45.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,000 (2016)
Projected traffic23,100 by 2036
Trucks14%
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US0090 over Charenton Canal built?

It was built in 1978, making it 47 years old in 2025.

What condition is US0090 over Charenton Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does US0090 over Charenton Canal carry?

About 21,000 vehicles per day (2016 count), of which roughly 14% are trucks.

How long is US0090 over Charenton Canal?

The structure is 2,924 ft (891.2 m) long with a longest span of 150 ft (45.7 m) and a deck 43 ft wide.

Who owns US0090 over Charenton Canal?

It is owned by the State Highway Agency.