US Bridges

I0010 over Atchafalaya River

Fair

St. Martin Parish, Louisiana · 6.98 MI East of LA 347 · Structure no. 035004500614371

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
3,040 ft
6 main spans
Daily traffic
56,100
2016 count
Owner
State
State Highway Agency

About this bridge

I0010 over Atchafalaya River is a steel continuous girder and floorbeam system carrying I0010 over Atchafalaya River in St. Martin Parish, Louisiana. It was built in 1972, so it is 53 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 56,100 vehicles a day, roughly 22% of them trucks, projected to reach 61,710 by 2036. The structure is 3,040 ft (926.6 m) long and 65 ft wide. If it were closed, the detour would be 67.1 mi (108 km).

Location

Open in Google Maps
CarriesI0010
CrossesAtchafalaya River
Location6.98 MI East of LA 347
RouteInterstate 10
CountySt. Martin Parish
StateLouisiana
Coordinates30.34277, -91.7211
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating39 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+19 approach)
Design loadHS 20
Structure length3,040 ft (926.6 m)
Longest span383 ft (116.7 m)
Deck width65 ft (19.9 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,100 (2016)
Projected traffic61,710 by 2036
Trucks22%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed67.1 mi (108 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I0010 over Atchafalaya River built?

It was built in 1972, making it 53 years old in 2025.

What condition is I0010 over Atchafalaya River 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 September 2024.

How much traffic does I0010 over Atchafalaya River carry?

About 56,100 vehicles per day (2016 count), of which roughly 22% are trucks.

How long is I0010 over Atchafalaya River?

The structure is 3,040 ft (926.6 m) long with a longest span of 383 ft (116.7 m) and a deck 65 ft wide.

Who owns I0010 over Atchafalaya River?

It is owned by the State Highway Agency.