US Bridges

US0090-B over Keyhole Canal

Good

Jefferson Parish, Louisiana · 2.7 MI East of LA 45 · Structure no. 022602830907131

Built
1992
33 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
67,143
2021 count
Owner
State
State Highway Agency

About this bridge

US0090-B over Keyhole Canal is a concrete culvert carrying US0090-B over Keyhole Canal in Jefferson Parish, Louisiana. It was built in 1992, so it is 33 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 67,143 vehicles a day, roughly 10% of them trucks, projected to reach 73,857 by 2041. The structure is 26 ft (7.9 m) long and 288 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0090-B
CrossesKeyhole Canal
Location2.7 MI East of LA 45
RouteU.S. Route 90
CountyJefferson Parish
StateLouisiana
Coordinates29.89832, -90.1428
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width288 ft (87.7 m)
Roadway width71 ft (21.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,143 (2021)
Projected traffic73,857 by 2041
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for 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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$315,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US0090-B over Keyhole Canal built?

It was built in 1992, making it 33 years old in 2025.

What condition is US0090-B over Keyhole Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does US0090-B over Keyhole Canal carry?

About 67,143 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is US0090-B over Keyhole Canal?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m) and a deck 288 ft wide.

Who owns US0090-B over Keyhole Canal?

It is owned by the State Highway Agency.