US Bridges

Betty ST over Mayronne Canal

Fair

Jefferson Parish, Louisiana · 0.2MI.SOUTH of Montg · Structure no. 022629527900701

Built
1970
55 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
200
1979 count
Owner
County
County Highway Agency

About this bridge

Betty ST over Mayronne Canal is a concrete slab carrying Betty ST over Mayronne Canal in Jefferson Parish, Louisiana. It was built in 1970, so it is 55 years old, older 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.

It carries about 200 vehicles a day, projected to reach 220 by 1999. The structure is 60 ft (18.3 m) long and 36 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesBetty ST
CrossesMayronne Canal
Location0.2MI.SOUTH of Montg
RouteCounty Highway 0
CountyJefferson Parish
StateLouisiana
Coordinates29.87934, -90.11723
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span21 ft (6.4 m)
Deck width36 ft (11.1 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (1979)
Projected traffic220 by 1999
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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 Betty ST over Mayronne Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is Betty ST over Mayronne 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 January 2023.

How much traffic does Betty ST over Mayronne Canal carry?

About 200 vehicles per day (1979 count).

How long is Betty ST over Mayronne Canal?

The structure is 60 ft (18.3 m) long with a longest span of 21 ft (6.4 m) and a deck 36 ft wide.

Who owns Betty ST over Mayronne Canal?

It is owned by the County Highway Agency.