US Bridges

Marlin Drive over Canal

FairPosted for load

St. Tammany Parish, Louisiana · 0.17 MI S of LA.433 · Structure no. 625200000620324

Built
1983
42 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
114 ft
6 main spans
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Marlin Drive over Canal is a concrete slab carrying Marlin Drive over Canal in St. Tammany Parish, Louisiana. It was built in 1983, so it is 42 years old, younger 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.

It carries about 300 vehicles a day, projected to reach 330 by 2040. The structure is 114 ft (34.7 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMarlin Drive
CrossesCanal
Location0.17 MI S of LA.433
RouteCounty Highway 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.18583, -89.75152
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadUnknown
Structure length114 ft (34.7 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.7 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic330 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Marlin Drive over Canal built?

It was built in 1983, making it 42 years old in 2025.

What condition is Marlin Drive over 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 February 2023.

How much traffic does Marlin Drive over Canal carry?

About 300 vehicles per day (2020 count).

How long is Marlin Drive over Canal?

The structure is 114 ft (34.7 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns Marlin Drive over Canal?

It is owned by the County Highway Agency.