I0010 over Boyle Bayou

Fair

Ascension Parish, Louisiana · 1.3 M S of I-10&LA 30 · Structure no. 610304501110591

Built: 1979; 46 years old
Condition: Fair; inspected January 2023
Type: Culvert; Concrete
Length: 37 ft; 3 main spans
Daily traffic: 60,802; 2021 count
Owner: State; State Highway Agency

About this bridge

I0010 over Boyle Bayou is a concrete culvert carrying I0010 over Boyle Bayou in Ascension Parish, Louisiana. It was built in 1979, so it is 46 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 60,802 vehicles a day, roughly 9% of them trucks, projected to reach 66,882 by 2041. The structure is 37 ft (11.3 m) long and 108 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0010

CrossesBoyle Bayou

Location1.3 M S of I-10&LA 30

RouteInterstate 10

CountyAscension Parish

StateLouisiana

Coordinates30.19766, -90.93176

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.

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJanuary 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating44 US tons

Inventory rating34 US tons

Structure

Structure typeCulvert

MaterialConcrete

DeckNot applicable

Main spans3

Design loadHS 20

Structure length37 ft (11.3 m)

Longest span8 ft (2.4 m)

Deck width108 ft (32.9 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,802 (2021)

Projected traffic66,882 by 2041

Trucks9%

Lanes on structure2

Traffic directionTwo-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 Boyle Bayou built?

It was built in 1979, making it 46 years old in 2025.

What condition is I0010 over Boyle 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 January 2023.

How much traffic does I0010 over Boyle Bayou carry?

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

How long is I0010 over Boyle Bayou?

The structure is 37 ft (11.3 m) long with a longest span of 8 ft (2.4 m) and a deck 108 ft wide.

Who owns I0010 over Boyle Bayou?

It is owned by the State Highway Agency.