US Bridges

US0061 over Bonnet Carre Spillway

Fair

St. Charles Parish, Louisiana · .7 MI West of LA 48 · Structure no. 024500070309181

Built
1984
41 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
6,006 ft
78 main spans
Daily traffic
23,719
2021 count
Owner
State
State Highway Agency

About this bridge

US0061 over Bonnet Carre Spillway is a prestressed concrete continuous stringer/multi-beam or girder carrying US0061 over Bonnet Carre Spillway in St. Charles Parish, Louisiana. It was built in 1984, so it is 41 years old, younger 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 23,719 vehicles a day, roughly 10% of them trucks, projected to reach 26,090 by 2041. The structure is 6,006 ft (1,830.6 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesUS0061
CrossesBonnet Carre Spillway
Location.7 MI West of LA 48
RouteU.S. Route 61
CountySt. Charles Parish
StateLouisiana
Coordinates30.02202, -90.4155
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans78
Design loadHS 20
Structure length6,006 ft (1,830.6 m)
Longest span78 ft (23.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,719 (2021)
Projected traffic26,090 by 2041
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US0061 over Bonnet Carre Spillway built?

It was built in 1984, making it 41 years old in 2025.

What condition is US0061 over Bonnet Carre Spillway 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 October 2023.

How much traffic does US0061 over Bonnet Carre Spillway carry?

About 23,719 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is US0061 over Bonnet Carre Spillway?

The structure is 6,006 ft (1,830.6 m) long with a longest span of 78 ft (23.8 m) and a deck 43 ft wide.

Who owns US0061 over Bonnet Carre Spillway?

It is owned by the State Highway Agency.