US Bridges

Lapalco Blvd over Murphy Canal

Fair

Jefferson Parish, Louisiana · 0.9MI.W.OF Manhattan · Structure no. 022629524900381

Built
1976
49 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
79 ft
3 main spans
Daily traffic
20,000
1979 count
Owner
County
County Highway Agency

About this bridge

Lapalco Blvd over Murphy Canal is a concrete slab carrying Lapalco Blvd over Murphy Canal in Jefferson Parish, Louisiana. It was built in 1976, so it is 49 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 20,000 vehicles a day, projected to reach 22,000 by 1999. The structure is 79 ft (24.1 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLapalco Blvd
CrossesMurphy Canal
Location0.9MI.W.OF Manhattan
RouteCounty Highway 0
CountyJefferson Parish
StateLouisiana
Coordinates29.87268, -90.06406
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span26 ft (7.9 m)
Deck width80 ft (24.5 m)
Roadway width70 ft (21.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (1979)
Projected traffic22,000 by 1999
Trucks—
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Murphy Canal built?

It was built in 1976, making it 49 years old in 2025.

What condition is Lapalco Blvd over Murphy Canal 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 January 2023.

How much traffic does Lapalco Blvd over Murphy Canal carry?

About 20,000 vehicles per day (1979 count).

How long is Lapalco Blvd over Murphy Canal?

The structure is 79 ft (24.1 m) long with a longest span of 26 ft (7.9 m) and a deck 80 ft wide.

Who owns Lapalco Blvd over Murphy Canal?

It is owned by the County Highway Agency.