US Bridges

Bayou Mercier RD over Berard Canal Bayou

Good

St. Martin Parish, Louisiana · .01 Mi. W. of LA 352 · Structure no. 035000000030506

Built
2017
8 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
5 main spans
Daily traffic
77
2020 count
Owner
County
County Highway Agency

About this bridge

Bayou Mercier RD over Berard Canal Bayou is a prestressed concrete stringer/multi-beam or girder carrying Bayou Mercier RD over Berard Canal Bayou in St. Martin Parish, Louisiana. It was built in 2017, so it is 8 years old, younger 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 77 vehicles a day, projected to reach 84 by 2040. The structure is 200 ft (61 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBayou Mercier RD
CrossesBerard Canal Bayou
Location.01 Mi. W. of LA 352
RouteCounty Highway 0
CountySt. Martin Parish
StateLouisiana
Coordinates30.24098, -91.71087
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadGreater than HL 93
Structure length200 ft (61 m)
Longest span40 ft (12.2 m)
Deck width26 ft (8 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77 (2020)
Projected traffic84 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Bayou Mercier RD over Berard Canal Bayou built?

It was built in 2017, making it 8 years old in 2025.

What condition is Bayou Mercier RD over Berard Canal Bayou 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 October 2024.

How much traffic does Bayou Mercier RD over Berard Canal Bayou carry?

About 77 vehicles per day (2020 count).

How long is Bayou Mercier RD over Berard Canal Bayou?

The structure is 200 ft (61 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns Bayou Mercier RD over Berard Canal Bayou?

It is owned by the County Highway Agency.