US Bridges

Dunn RD over Canal

FairPosted for load

Livingston Parish, Louisiana · 0.20 Mi. East of LA 1026 · Structure no. 623200000620357

Built
2018
7 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
2 main spans
Daily traffic
1,500
2022 count
Owner
County
County Highway Agency

About this bridge

Dunn RD over Canal is a wood or timber stringer/multi-beam or girder carrying Dunn RD over Canal in Livingston Parish, Louisiana. It was built in 2018, so it is 7 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. Its operating status is: posted for load restriction.

It carries about 1,500 vehicles a day, projected to reach 1,650 by 2042. The structure is 39 ft (11.9 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesDunn RD
CrossesCanal
Location0.20 Mi. East of LA 1026
RouteCounty Highway 0
CountyLivingston Parish
StateLouisiana
Coordinates30.50515, -90.92164
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2022)
Projected traffic1,650 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Dunn RD over Canal built?

It was built in 2018, making it 7 years old in 2025.

What condition is Dunn RD 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 September 2024.

How much traffic does Dunn RD over Canal carry?

About 1,500 vehicles per day (2022 count).

How long is Dunn RD over Canal?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Dunn RD over Canal?

It is owned by the County Highway Agency.