US Bridges

LA0074 over Narcisse Bayou

Good

Ascension Parish, Louisiana · 0.1 MI E of US 61 · Structure no. 610300000610019

Built
2022
3 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
10,765
2022 count
Owner
State
State Highway Agency

About this bridge

LA0074 over Narcisse Bayou is a concrete culvert carrying LA0074 over Narcisse Bayou in Ascension Parish, Louisiana. It was built in 2022, so it is 3 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 10,765 vehicles a day, projected to reach 11,841 by 2042. The structure is 22 ft (6.7 m) long and 83 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0074
CrossesNarcisse Bayou
Location0.1 MI E of US 61
RouteState Highway 74
CountyAscension Parish
StateLouisiana
Coordinates30.25589, -90.93276
Functional classRural Major Collector

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadGreater than HL 93
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width83 ft (25.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,765 (2022)
Projected traffic11,841 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 LA0074 over Narcisse Bayou built?

It was built in 2022, making it 3 years old in 2025.

What condition is LA0074 over Narcisse Bayou 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 LA0074 over Narcisse Bayou carry?

About 10,765 vehicles per day (2022 count).

How long is LA0074 over Narcisse Bayou?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 83 ft wide.

Who owns LA0074 over Narcisse Bayou?

It is owned by the State Highway Agency.