US Bridges

I0010 over Bayou Manchac

Fair

Ascension Parish, Louisiana · I0010 · Structure no. 610304501100002

Built
1970
55 years old, rebuilt 1993
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
200 ft
8 main spans
Daily traffic
45,150
2016 count
Owner
State
State Highway Agency

About this bridge

I0010 over Bayou Manchac is a concrete slab carrying I0010 over Bayou Manchac in Ascension Parish, Louisiana. It was built in 1970 and reconstructed in 1993, so it is 55 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 45,150 vehicles a day, roughly 9% of them trucks, projected to reach 49,665 by 2036. The structure is 200 ft (61 m) long and 63 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesI0010
CrossesBayou Manchac
LocationI0010
RouteInterstate 10
Coordinates30.33037, -91.01402
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length200 ft (61 m)
Longest span25 ft (7.6 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,150 (2016)
Projected traffic49,665 by 2036
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I0010 over Bayou Manchac built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1993.

What condition is I0010 over Bayou Manchac 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 June 2024.

How much traffic does I0010 over Bayou Manchac carry?

About 45,150 vehicles per day (2016 count), of which roughly 9% are trucks.

How long is I0010 over Bayou Manchac?

The structure is 200 ft (61 m) long with a longest span of 25 ft (7.6 m) and a deck 63 ft wide.

Who owns I0010 over Bayou Manchac?

It is owned by the State Highway Agency.