US Bridges

US0061 over Bonnet Carre

Fair

St. Charles Parish, Louisiana · .7 MI West of LA 48 · Structure no. 024500070309182

Built
1935
90 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
6,006 ft
155 main spans
Daily traffic
25,051
2021 count
Owner
State
State Highway Agency

About this bridge

US0061 over Bonnet Carre is a concrete tee beam carrying US0061 over Bonnet Carre in St. Charles Parish, Louisiana. It was built in 1935, so it is 90 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 25,051 vehicles a day, roughly 10% of them trucks, projected to reach 27,556 by 2041. The structure is 6,006 ft (1,830.6 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesUS0061
CrossesBonnet Carre
Location.7 MI West of LA 48
RouteU.S. Route 61
CountySt. Charles Parish
StateLouisiana
Coordinates30.03254, -90.43011
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to 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 rating46 US tons
Inventory rating28 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans155
Design loadH 15
Structure length6,006 ft (1,830.6 m)
Longest span38 ft (11.6 m)
Deck width46 ft (13.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,051 (2021)
Projected traffic27,556 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 statusEligible 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 built?

It was built in 1935, making it 90 years old in 2025.

What condition is US0061 over Bonnet Carre 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 carry?

About 25,051 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is US0061 over Bonnet Carre?

The structure is 6,006 ft (1,830.6 m) long with a longest span of 38 ft (11.6 m) and a deck 46 ft wide.

Who owns US0061 over Bonnet Carre?

It is owned by the State Highway Agency.