US Bridges

US0051 over Drainage Canal

Fair

St. John the Baptist Parish, Louisiana · 3.5 Miles North of LA 61 · Structure no. 624804520100533

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
90 ft
3 main spans
Daily traffic
16,686
2021 count
Owner
State
State Highway Agency

About this bridge

US0051 over Drainage Canal is a concrete slab carrying US0051 over Drainage Canal in St. John the Baptist Parish, Louisiana. It was built in 1975, so it is 50 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 16,686 vehicles a day, roughly 9% of them trucks, projected to reach 18,354 by 2041. The structure is 90 ft (27.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0051
CrossesDrainage Canal
Location3.5 Miles North of LA 61
RouteU.S. Route 51
CountySt. John the Baptist Parish
StateLouisiana
Coordinates30.09491, -90.43726
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width55 ft (16.8 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,686 (2021)
Projected traffic18,354 by 2041
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 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 US0051 over Drainage Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is US0051 over Drainage 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 June 2023.

How much traffic does US0051 over Drainage Canal carry?

About 16,686 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is US0051 over Drainage Canal?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 55 ft wide.

Who owns US0051 over Drainage Canal?

It is owned by the State Highway Agency.