US Bridges

LA0047 over I C Waterway(gulf Outlet

Fair

Orleans Parish, Louisiana · 2.0 MI South of I-10 · Structure no. 023601480201061

Built
1967
58 years old
Condition
Fair
inspected August 2024
Type
Truss - Thru
Steel
Length
6,622 ft
3 main spans
Daily traffic
23,365
2021 count
Owner
State
State Highway Agency

About this bridge

LA0047 over I C Waterway(gulf Outlet is a steel truss - thru carrying LA0047 over I C Waterway(gulf Outlet in Orleans Parish, Louisiana. It was built in 1967, so it is 58 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.

It carries about 23,365 vehicles a day, roughly 10% of them trucks, projected to reach 25,701 by 2041. The structure is 6,622 ft (2,018.4 m) long and 66 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesLA0047
CrossesI C Waterway(gulf Outlet
Location2.0 MI South of I-10
RouteState Highway 47
CountyOrleans Parish
StateLouisiana
Coordinates29.99612, -89.9399
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+66 approach)
Design loadHS 20
Structure length6,622 ft (2,018.4 m)
Longest span702 ft (214 m)
Deck width66 ft (20.2 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic23,365 (2021)
Projected traffic25,701 by 2041
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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 LA0047 over I C Waterway(gulf Outlet built?

It was built in 1967, making it 58 years old in 2025.

What condition is LA0047 over I C Waterway(gulf Outlet 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 August 2024.

How much traffic does LA0047 over I C Waterway(gulf Outlet carry?

About 23,365 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0047 over I C Waterway(gulf Outlet?

The structure is 6,622 ft (2,018.4 m) long with a longest span of 702 ft (214 m) and a deck 66 ft wide.

Who owns LA0047 over I C Waterway(gulf Outlet?

It is owned by the State Highway Agency.