US Bridges

LA0055 over Humble Canal

Good

Terrebonne Parish, Louisiana · 4.8 MI South of LA 58 · Structure no. 025502480204001

Built
1998
27 years old
Condition
Good
inspected July 2023
Type
Movable - Swing
Steel
Length
995 ft
2 main spans
Daily traffic
280
2016 count
Owner
State
State Highway Agency

About this bridge

LA0055 over Humble Canal is a steel movable - swing carrying LA0055 over Humble Canal in Terrebonne Parish, Louisiana. It was built in 1998, so it is 27 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 280 vehicles a day, roughly 12% of them trucks, projected to reach 308 by 2036. The structure is 995 ft (303.3 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0055
CrossesHumble Canal
Location4.8 MI South of LA 58
RouteState Highway 55
CountyTerrebonne Parish
StateLouisiana
Coordinates29.43687, -90.5666
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans2 (+19 approach)
Design loadHS 20
Structure length995 ft (303.3 m)
Longest span143 ft (43.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck20 ft (6 m)

Traffic and service

Average daily traffic280 (2016)
Projected traffic308 by 2036
Trucks12%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0055 over Humble Canal built?

It was built in 1998, making it 27 years old in 2025.

What condition is LA0055 over Humble 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 July 2023.

How much traffic does LA0055 over Humble Canal carry?

About 280 vehicles per day (2016 count), of which roughly 12% are trucks.

How long is LA0055 over Humble Canal?

The structure is 995 ft (303.3 m) long with a longest span of 143 ft (43.6 m) and a deck 35 ft wide.

Who owns LA0055 over Humble Canal?

It is owned by the State Highway Agency.