US Bridges

N. Bayou Black RD over Hanson Canal

Good

Terrebonne Parish, Louisiana · 0.1 MI NW of LA 182 · Structure no. 025500000000033

Built
2021
4 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
9,159
2022 count
Owner
County
County Highway Agency

About this bridge

N. Bayou Black RD over Hanson Canal is a concrete slab carrying N. Bayou Black RD over Hanson Canal in Terrebonne Parish, Louisiana. It was built in 2021, so it is 4 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,159 vehicles a day, projected to reach 10,074 by 2042. The structure is 80 ft (24.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN. Bayou Black RD
CrossesHanson Canal
Location0.1 MI NW of LA 182
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.60875, -90.85685
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadGreater than HL 93
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,159 (2022)
Projected traffic10,074 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 N. Bayou Black RD over Hanson Canal built?

It was built in 2021, making it 4 years old in 2025.

What condition is N. Bayou Black RD over Hanson 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 April 2023.

How much traffic does N. Bayou Black RD over Hanson Canal carry?

About 9,159 vehicles per day (2022 count).

How long is N. Bayou Black RD over Hanson Canal?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns N. Bayou Black RD over Hanson Canal?

It is owned by the County Highway Agency.