US Bridges

US0090 over Bayou Ramos

PoorPosted for load

St. Mary Parish, Louisiana · 2.5 MI W. of LA 662 · Structure no. 035104240536942

Built
1994
31 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
8,369 ft
107 main spans
Daily traffic
10,035
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Bayou Ramos is a prestressed concrete stringer/multi-beam or girder carrying US0090 over Bayou Ramos in St. Mary Parish, Louisiana. It was built in 1994, so it is 31 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10,035 vehicles a day, roughly 14% of them trucks, projected to reach 11,038 by 2041. The structure is 8,369 ft (2,550.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS0090
CrossesBayou Ramos
Location2.5 MI W. of LA 662
RouteU.S. Route 90
Coordinates29.6757, -91.13294
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating32.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans107 (+14 approach)
Design loadHS 20
Structure length8,369 ft (2,550.9 m)
Longest span120 ft (36.6 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,035 (2021)
Projected traffic11,038 by 2041
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$33.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US0090 over Bayou Ramos built?

It was built in 1994, making it 31 years old in 2025.

What condition is US0090 over Bayou Ramos in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does US0090 over Bayou Ramos carry?

About 10,035 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is US0090 over Bayou Ramos?

The structure is 8,369 ft (2,550.9 m) long with a longest span of 120 ft (36.6 m) and a deck 43 ft wide.

Who owns US0090 over Bayou Ramos?

It is owned by the State Highway Agency.