US Bridges

HWY 11/PAR RD 11 over Doullut Canal

Fair

Plaquemines Parish, Louisiana · 0.6 Miles South of Oak LA · Structure no. 023800000103026

Built
2013
12 years old
Condition
Fair
inspected January 2023
Type
Movable - Swing
Steel
Length
240 ft
1 main span
Daily traffic
3,700
2016 count
Owner
County
County Highway Agency

About this bridge

HWY 11/PAR RD 11 over Doullut Canal is a steel movable - swing carrying HWY 11/PAR RD 11 over Doullut Canal in Plaquemines Parish, Louisiana. It was built in 2013, so it is 12 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.

It carries about 3,700 vehicles a day, projected to reach 4,070 by 2036. The structure is 240 ft (73.2 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHWY 11/PAR RD 11
CrossesDoullut Canal
Location0.6 Miles South of Oak LA
RouteCounty Highway 0
CountyPlaquemines Parish
StateLouisiana
Coordinates29.38803, -89.59828
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.1 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans1 (+4 approach)
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span160 ft (48.8 m)
Deck width41 ft (12.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2016)
Projected traffic4,070 by 2036
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was HWY 11/PAR RD 11 over Doullut Canal built?

It was built in 2013, making it 12 years old in 2025.

What condition is HWY 11/PAR RD 11 over Doullut 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 HWY 11/PAR RD 11 over Doullut Canal carry?

About 3,700 vehicles per day (2016 count).

How long is HWY 11/PAR RD 11 over Doullut Canal?

The structure is 240 ft (73.2 m) long with a longest span of 160 ft (48.8 m) and a deck 41 ft wide.

Who owns HWY 11/PAR RD 11 over Doullut Canal?

It is owned by the County Highway Agency.