US Bridges

Lapalco Blvd over Keyhole Canal

Good

Jefferson Parish, Louisiana · 0.5 Mi. S. of W.B. Expwy. · Structure no. 022629534900881

Built
1984
41 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete
Length
51 ft
4 main spans
Daily traffic
1,000
1979 count
Owner
County
County Highway Agency

About this bridge

Lapalco Blvd over Keyhole Canal is a concrete culvert carrying Lapalco Blvd over Keyhole Canal in Jefferson 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 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 1,000 vehicles a day, projected to reach 1,100 by 1999. The structure is 51 ft (15.5 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLapalco Blvd
CrossesKeyhole Canal
Location0.5 Mi. S. of W.B. Expwy.
RouteCounty Highway 0
CountyJefferson Parish
StateLouisiana
Coordinates29.89052, -90.1474
Functional classUrban Local

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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span11 ft (3.4 m)
Deck width69 ft (21.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (1979)
Projected traffic1,100 by 1999
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Lapalco Blvd over Keyhole Canal built?

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

What condition is Lapalco Blvd 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 January 2023.

How much traffic does Lapalco Blvd over Keyhole Canal carry?

About 1,000 vehicles per day (1979 count).

How long is Lapalco Blvd over Keyhole Canal?

The structure is 51 ft (15.5 m) long with a longest span of 11 ft (3.4 m) and a deck 69 ft wide.

Who owns Lapalco Blvd over Keyhole Canal?

It is owned by the County Highway Agency.