US Bridges

LA0661 over Bayou Salle

Fair

Terrebonne Parish, Louisiana · .2 MI East of LA 57 · Structure no. 025500653001681

Built
1961
64 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
21 ft
5 main spans
Daily traffic
5,780
2021 count
Owner
State
State Highway Agency

About this bridge

LA0661 over Bayou Salle is a concrete culvert carrying LA0661 over Bayou Salle in Terrebonne Parish, Louisiana. It was built in 1961, so it is 64 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 5,780 vehicles a day, roughly 11% of them trucks, projected to reach 6,358 by 2041. The structure is 21 ft (6.4 m) long and 140 ft wide.

Location

Open in Google Maps
CarriesLA0661
CrossesBayou Salle
Location.2 MI East of LA 57
RouteState Highway 661
CountyTerrebonne Parish
StateLouisiana
Coordinates29.59047, -90.6977
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span4 ft (1.2 m)
Deck width140 ft (42.7 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,780 (2021)
Projected traffic6,358 by 2041
Trucks11%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$286,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0661 over Bayou Salle built?

It was built in 1961, making it 64 years old in 2025.

What condition is LA0661 over Bayou Salle 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 December 2024.

How much traffic does LA0661 over Bayou Salle carry?

About 5,780 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0661 over Bayou Salle?

The structure is 21 ft (6.4 m) long with a longest span of 4 ft (1.2 m) and a deck 140 ft wide.

Who owns LA0661 over Bayou Salle?

It is owned by the State Highway Agency.