US Bridges

Mumphrey RD over 20 Arpent Canal

Good

St. Bernard Parish, Louisiana · 0.7 MI N of LA 39 · Structure no. 024400000024402

Built
2020
5 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
700
2020 count
Owner
County
County Highway Agency

About this bridge

Mumphrey RD over 20 Arpent Canal is a concrete culvert carrying Mumphrey RD over 20 Arpent Canal in St. Bernard Parish, Louisiana. It was built in 2020, so it is 5 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 700 vehicles a day, projected to reach 770 by 2040. The structure is 22 ft (6.7 m) long and 48 ft wide.

Location

Open in Google Maps
CarriesMumphrey RD
Crosses20 Arpent Canal
Location0.7 MI N of LA 39
RouteCounty Highway 0
CountySt. Bernard Parish
StateLouisiana
Coordinates29.94582, -89.94426
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating50.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width48 ft (14.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2020)
Projected traffic770 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 Mumphrey RD over 20 Arpent Canal built?

It was built in 2020, making it 5 years old in 2025.

What condition is Mumphrey RD over 20 Arpent 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 February 2023.

How much traffic does Mumphrey RD over 20 Arpent Canal carry?

About 700 vehicles per day (2020 count).

How long is Mumphrey RD over 20 Arpent Canal?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 48 ft wide.

Who owns Mumphrey RD over 20 Arpent Canal?

It is owned by the County Highway Agency.