US Bridges

US0090 over B Desallemands

Fair

St. Charles Parish, Louisiana · .4 MI West of LA 362 · Structure no. 024500050800001

Built
1961
64 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
2,611 ft
38 main spans
Daily traffic
20,956
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over B Desallemands is a steel stringer/multi-beam or girder carrying US0090 over B Desallemands in St. Charles 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 5 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 20,956 vehicles a day, roughly 10% of them trucks, projected to reach 23,051 by 2041. The structure is 2,611 ft (795.8 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0090
CrossesB Desallemands
Location.4 MI West of LA 362
RouteU.S. Route 90
CountySt. Charles Parish
StateLouisiana
Coordinates29.82167, -90.48115
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans38
Design loadHS 20
Structure length2,611 ft (795.8 m)
Longest span150 ft (45.7 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,956 (2021)
Projected traffic23,051 by 2041
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10.2 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US0090 over B Desallemands built?

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

What condition is US0090 over B Desallemands 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 US0090 over B Desallemands carry?

About 20,956 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is US0090 over B Desallemands?

The structure is 2,611 ft (795.8 m) long with a longest span of 150 ft (45.7 m) and a deck 33 ft wide.

Who owns US0090 over B Desallemands?

It is owned by the State Highway Agency.