US Bridges

Tan RD over Bayou Grand Marais

Good

Vermilion Parish, Louisiana · 0.6 M E. of LA 35 · Structure no. 035700000030528

Built
2018
7 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
57 ft
3 main spans
Daily traffic
421
2022 count
Owner
County
County Highway Agency

About this bridge

Tan RD over Bayou Grand Marais is a wood or timber stringer/multi-beam or girder carrying Tan RD over Bayou Grand Marais in Vermilion Parish, Louisiana. It was built in 2018, so it is 7 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 421 vehicles a day, projected to reach 463 by 2042. The structure is 57 ft (17.4 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTan RD
CrossesBayou Grand Marais
Location0.6 M E. of LA 35
RouteCounty Highway 0
CountyVermilion Parish
StateLouisiana
Coordinates30.09395, -92.26634
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.3 US tons
Inventory rating41.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic421 (2022)
Projected traffic463 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Tan RD over Bayou Grand Marais built?

It was built in 2018, making it 7 years old in 2025.

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

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

About 421 vehicles per day (2022 count).

How long is Tan RD over Bayou Grand Marais?

The structure is 57 ft (17.4 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Tan RD over Bayou Grand Marais?

It is owned by the County Highway Agency.