US Bridges

Honey Island Swamp over Duck Bayou

Fair

St. Tammany Parish, Louisiana · 0.9M East of I-59 · Structure no. 625230236894311

Built
1982
43 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
96 ft
5 main spans
Daily traffic
—
2016 count
Owner
State
Other State Agency

About this bridge

Honey Island Swamp over Duck Bayou is a concrete slab carrying Honey Island Swamp over Duck Bayou in St. Tammany Parish, Louisiana. It was built in 1982, so it is 43 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

No traffic count is recorded. The structure is 96 ft (29.3 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesHoney Island Swamp
CrossesDuck Bayou
Location0.9M East of I-59
RouteCounty Highway 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.39312, -89.71926
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 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 closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State 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 Honey Island Swamp over Duck Bayou built?

It was built in 1982, making it 43 years old in 2025.

What condition is Honey Island Swamp over Duck Bayou 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 Honey Island Swamp over Duck Bayou carry?

No traffic count is recorded for this structure.

How long is Honey Island Swamp over Duck Bayou?

The structure is 96 ft (29.3 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Honey Island Swamp over Duck Bayou?

It is owned by the Other State Agency.