US Bridges

11th ST over 3 Mile Canal

Good

Jefferson Parish, Louisiana · 0.1 Mi. East of Manhattan · Structure no. 022629530900331

Built
1985
40 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
500
1980 count
Owner
County
County Highway Agency

About this bridge

11th ST over 3 Mile Canal is a prestressed concrete stringer/multi-beam or girder carrying 11th ST over 3 Mile Canal in Jefferson Parish, Louisiana. It was built in 1985, so it is 40 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, projected to reach 550 by 2000. The structure is 41 ft (12.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries11th ST
Crosses3 Mile Canal
Location0.1 Mi. East of Manhattan
RouteCounty Highway 0
CountyJefferson Parish
StateLouisiana
Coordinates29.87933, -90.05332
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.3 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width43 ft (13.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (1980)
Projected traffic550 by 2000
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 11th ST over 3 Mile Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is 11th ST over 3 Mile 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 January 2023.

How much traffic does 11th ST over 3 Mile Canal carry?

About 500 vehicles per day (1980 count).

How long is 11th ST over 3 Mile Canal?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m) and a deck 43 ft wide.

Who owns 11th ST over 3 Mile Canal?

It is owned by the County Highway Agency.