US Bridges

I0010 over Smith Bayou

Fair

Ascension Parish, Louisiana · 1.17 M West of LA 30 · Structure no. 610304501108081

Built
1975
50 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
60,802
2021 count
Owner
State
State Highway Agency

About this bridge

I0010 over Smith Bayou is a concrete slab carrying I0010 over Smith Bayou in Ascension Parish, Louisiana. It was built in 1975, so it is 50 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 60,802 vehicles a day, roughly 9% of them trucks, projected to reach 66,882 by 2041. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI0010
CrossesSmith Bayou
Location1.17 M West of LA 30
RouteInterstate 10
CountyAscension Parish
StateLouisiana
Coordinates30.22458, -90.95925
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,802 (2021)
Projected traffic66,882 by 2041
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Smith Bayou built?

It was built in 1975, making it 50 years old in 2025.

What condition is I0010 over Smith Bayou 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 Smith Bayou carry?

About 60,802 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is I0010 over Smith Bayou?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns I0010 over Smith Bayou?

It is owned by the State Highway Agency.