US Bridges

Adema LN over Drainage Canal

FairPosted for load

Plaquemines Parish, Louisiana · 0.0 S of SR 39 · Structure no. 023829350894771

Built
1968
57 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
95 ft
10 main spans
Daily traffic
—
2016 count
Owner
County
County Highway Agency

About this bridge

Adema LN over Drainage Canal is a concrete slab carrying Adema LN over Drainage Canal in Plaquemines Parish, Louisiana. It was built in 1968, so it is 57 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

No traffic count is recorded. The structure is 95 ft (29 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesAdema LN
CrossesDrainage Canal
Location0.0 S of SR 39
RouteCounty Highway 0
CountyPlaquemines Parish
StateLouisiana
Coordinates29.58363, -89.79403
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating16.4 US tons
Inventory rating12.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans10
Design loadHS 20
Structure length95 ft (29 m)
Longest span10 ft (3 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Adema LN over Drainage Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Adema LN 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 January 2023.

How much traffic does Adema LN over Drainage Canal carry?

No traffic count is recorded for this structure.

How long is Adema LN over Drainage Canal?

The structure is 95 ft (29 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.

Who owns Adema LN over Drainage Canal?

It is owned by the County Highway Agency.