US Bridges

LA0648 over Drain Canal

PoorPosted for load

Lafourche Parish, Louisiana · .62 MI East of LA 648 · Structure no. 022908292900621

Built
1959
66 years old
Condition
Poor
inspected January 2024
Type
Slab
Concrete
Length
79 ft
4 main spans
Daily traffic
9,183
2021 count
Owner
State
State Highway Agency

About this bridge

LA0648 over Drain Canal is a concrete slab carrying LA0648 over Drain Canal in Lafourche Parish, Louisiana. It was built in 1959, so it is 66 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 9,183 vehicles a day, roughly 18% of them trucks, projected to reach 10,101 by 2041. The structure is 79 ft (24.1 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLA0648
CrossesDrain Canal
Location.62 MI East of LA 648
RouteState Highway 648
Coordinates29.77874, -90.7986
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating20.7 US tons
Inventory rating14.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length79 ft (24.1 m)
Longest span19 ft (5.8 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,183 (2021)
Projected traffic10,101 by 2041
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$405,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0648 over Drain Canal built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0648 over Drain Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does LA0648 over Drain Canal carry?

About 9,183 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is LA0648 over Drain Canal?

The structure is 79 ft (24.1 m) long with a longest span of 19 ft (5.8 m) and a deck 29 ft wide.

Who owns LA0648 over Drain Canal?

It is owned by the State Highway Agency.