US Bridges

Causeway@napoleon over West Nap.Canal Number 4

Good

Jefferson Parish, Louisiana · 0.5 Mi. North of Us. 61 · Structure no. 022629595900931

Built
1980
45 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
30,300
1979 count
Owner
County
County Highway Agency

About this bridge

Causeway@napoleon over West Nap.Canal Number 4 is a concrete culvert carrying Causeway@napoleon over West Nap.Canal Number 4 in Jefferson Parish, Louisiana. It was built in 1980, so it is 45 years old, older 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 30,300 vehicles a day, projected to reach 33,330 by 1999. The structure is 26 ft (7.9 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCauseway@napoleon
CrossesWest Nap.Canal Number 4
Location0.5 Mi. North of Us. 61
RouteCounty Highway 0
CountyJefferson Parish
StateLouisiana
Coordinates29.99218, -90.15567
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being 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 spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width100 ft (30.4 m)
Roadway width78 ft (23.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,300 (1979)
Projected traffic33,330 by 1999
Trucks—
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Causeway@napoleon over West Nap.Canal Number 4 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Causeway@napoleon over West Nap.Canal Number 4 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 April 2023.

How much traffic does Causeway@napoleon over West Nap.Canal Number 4 carry?

About 30,300 vehicles per day (1979 count).

How long is Causeway@napoleon over West Nap.Canal Number 4?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m) and a deck 100 ft wide.

Who owns Causeway@napoleon over West Nap.Canal Number 4?

It is owned by the County Highway Agency.