US Bridges

LA0996 over Grand Bayou

Fair

Iberville Parish, Louisiana · 2.7 M N of LA 70 · Structure no. 612408240800021

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
135 ft
7 main spans
Daily traffic
524
2021 count
Owner
State
State Highway Agency

About this bridge

LA0996 over Grand Bayou is a concrete slab carrying LA0996 over Grand Bayou in Iberville Parish, Louisiana. It was built in 1973, so it is 52 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 524 vehicles a day, roughly 10% of them trucks, projected to reach 576 by 2041. The structure is 135 ft (41.1 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLA0996
CrossesGrand Bayou
Location2.7 M N of LA 70
RouteState Highway 996
CountyIberville Parish
StateLouisiana
Coordinates30.05427, -91.13682
Functional classRural Local

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 inspectionMarch 2024
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 rating37.5 US tons
Inventory rating26.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans7
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic524 (2021)
Projected traffic576 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 LA0996 over Grand Bayou built?

It was built in 1973, making it 52 years old in 2025.

What condition is LA0996 over Grand 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 March 2024.

How much traffic does LA0996 over Grand Bayou carry?

About 524 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0996 over Grand Bayou?

The structure is 135 ft (41.1 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0996 over Grand Bayou?

It is owned by the State Highway Agency.