US Bridges

Dr. Beatrous RD over Marmande Canal

FairPosted for load

Terrebonne Parish, Louisiana · 0.3 MI N of St. Eloi RD · Structure no. 025529278904521

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
79 ft
4 main spans
Daily traffic
330
2022 count
Owner
County
County Highway Agency

About this bridge

Dr. Beatrous RD over Marmande Canal is a steel continuous stringer/multi-beam or girder carrying Dr. Beatrous RD over Marmande Canal in Terrebonne Parish, Louisiana. It was built in 1960, so it is 65 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 5 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 330 vehicles a day, projected to reach 363 by 2042. The structure is 79 ft (24.1 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesDr. Beatrous RD
CrossesMarmande Canal
Location0.3 MI N of St. Eloi RD
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.46297, -90.75326
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating20 US tons
Inventory rating15 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckWood or timber
Main spans4
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2022)
Projected traffic363 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$283,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Dr. Beatrous RD over Marmande Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is Dr. Beatrous RD over Marmande 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 May 2023.

How much traffic does Dr. Beatrous RD over Marmande Canal carry?

About 330 vehicles per day (2022 count).

How long is Dr. Beatrous RD over Marmande Canal?

The structure is 79 ft (24.1 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns Dr. Beatrous RD over Marmande Canal?

It is owned by the County Highway Agency.