US Bridges

LA3087 over Intracoastal Ww

Fair

Terrebonne Parish, Louisiana · .1 MI East of LA 659 · Structure no. 025508551400331

Built
1980
45 years old
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
4,197 ft
3 main spans
Daily traffic
13,617
2021 count
Owner
State
State Highway Agency

About this bridge

LA3087 over Intracoastal Ww is a steel continuous girder and floorbeam system carrying LA3087 over Intracoastal Ww in Terrebonne 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 13,617 vehicles a day, roughly 11% of them trucks, projected to reach 14,978 by 2041. The structure is 4,197 ft (1,279.2 m) long and 75 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLA3087
CrossesIntracoastal Ww
Location.1 MI East of LA 659
RouteState Highway 3087
CountyTerrebonne Parish
StateLouisiana
Coordinates29.59513, -90.6759
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating34 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+43 approach)
Design loadHS 20
Structure length4,197 ft (1,279.2 m)
Longest span300 ft (91.4 m)
Deck width75 ft (22.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,617 (2021)
Projected traffic14,978 by 2041
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA3087 over Intracoastal Ww built?

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

What condition is LA3087 over Intracoastal Ww 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 October 2023.

How much traffic does LA3087 over Intracoastal Ww carry?

About 13,617 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA3087 over Intracoastal Ww?

The structure is 4,197 ft (1,279.2 m) long with a longest span of 300 ft (91.4 m) and a deck 75 ft wide.

Who owns LA3087 over Intracoastal Ww?

It is owned by the State Highway Agency.