US Bridges

I0010 over Mississippi Bayou

Fair

St. John the Baptist Parish, Louisiana · I0010 · Structure no. 624804501304151

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
125 ft
5 main spans
Daily traffic
44,074
2021 count
Owner
State
State Highway Agency

About this bridge

I0010 over Mississippi Bayou is a concrete slab carrying I0010 over Mississippi Bayou in St. John the Baptist 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 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 44,074 vehicles a day, roughly 25% of them trucks, projected to reach 48,481 by 2041. The structure is 125 ft (38.1 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI0010
CrossesMississippi Bayou
LocationI0010
RouteInterstate 10
CountySt. John the Baptist Parish
StateLouisiana
Coordinates30.11421, -90.5808
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating83 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span25 ft (7.6 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,074 (2021)
Projected traffic48,481 by 2041
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Mississippi Bayou built?

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

What condition is I0010 over Mississippi 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 2023.

How much traffic does I0010 over Mississippi Bayou carry?

About 44,074 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0010 over Mississippi Bayou?

The structure is 125 ft (38.1 m) long with a longest span of 25 ft (7.6 m) and a deck 40 ft wide.

Who owns I0010 over Mississippi Bayou?

It is owned by the State Highway Agency.