US Bridges

Waterplant RD over Devil Swamp Canal

Good

Terrebonne Parish, Louisiana · 03.15 MI from LA 24 · Structure no. 025529436904781

Built
1986
39 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
1,958
2023 count
Owner
County
County Highway Agency

About this bridge

Waterplant RD over Devil Swamp Canal is a concrete slab carrying Waterplant RD over Devil Swamp Canal in Terrebonne Parish, Louisiana. It was built in 1986, so it is 39 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,958 vehicles a day, projected to reach 2,153 by 2043. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWaterplant RD
CrossesDevil Swamp Canal
Location03.15 MI from LA 24
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.72862, -90.79631
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,958 (2023)
Projected traffic2,153 by 2043
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 Waterplant RD over Devil Swamp Canal built?

It was built in 1986, making it 39 years old in 2025.

What condition is Waterplant RD over Devil Swamp Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Waterplant RD over Devil Swamp Canal carry?

About 1,958 vehicles per day (2023 count).

How long is Waterplant RD over Devil Swamp Canal?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Waterplant RD over Devil Swamp Canal?

It is owned by the County Highway Agency.