US Bridges

Amerada RD over Grand Marais Bayou

FairPosted for load

Vermilion Parish, Louisiana · 3.0 Mi. SW of LA 92 · Structure no. 035730043921961

Built
1980
45 years old
Condition
Fair
inspected July 2023
Type
Channel Beam
Prestressed Concrete
Length
40 ft
2 main spans
Daily traffic
160
2022 count
Owner
County
County Highway Agency

About this bridge

Amerada RD over Grand Marais Bayou is a prestressed concrete channel beam carrying Amerada RD over Grand Marais Bayou in Vermilion Parish, Louisiana. It was built in 1980, so it is 45 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. Its operating status is: posted for load restriction.

It carries about 160 vehicles a day, projected to reach 176 by 2042. The structure is 40 ft (12.2 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesAmerada RD
CrossesGrand Marais Bayou
Location3.0 Mi. SW of LA 92
RouteCounty Highway 0
CountyVermilion Parish
StateLouisiana
Coordinates30.07167, -92.32731
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2022)
Projected traffic176 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Amerada RD over Grand Marais Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is Amerada RD over Grand Marais Bayou 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 July 2023.

How much traffic does Amerada RD over Grand Marais Bayou carry?

About 160 vehicles per day (2022 count).

How long is Amerada RD over Grand Marais Bayou?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 22 ft wide.

Who owns Amerada RD over Grand Marais Bayou?

It is owned by the County Highway Agency.