US Bridges

Roddy RD over Bayou Narcisse

FairPosted for load

Ascension Parish, Louisiana · .7 Mi.Ne-La 3030 US61 JCT · Structure no. 610330143905421

Built
1994
31 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
500
2019 count
Owner
County
County Highway Agency

About this bridge

Roddy RD over Bayou Narcisse is a concrete slab carrying Roddy RD over Bayou Narcisse in Ascension Parish, Louisiana. It was built in 1994, so it is 31 years old, younger 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, projected to reach 550 by 2039. The structure is 76 ft (23.2 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRoddy RD
CrossesBayou Narcisse
Location.7 Mi.Ne-La 3030 US61 JCT
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.23861, -90.90391
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17.9 US tons
Inventory rating13.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2019)
Projected traffic550 by 2039
Trucks—
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$274,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Roddy RD over Bayou Narcisse built?

It was built in 1994, making it 31 years old in 2025.

What condition is Roddy RD over Bayou Narcisse 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 February 2023.

How much traffic does Roddy RD over Bayou Narcisse carry?

About 500 vehicles per day (2019 count).

How long is Roddy RD over Bayou Narcisse?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns Roddy RD over Bayou Narcisse?

It is owned by the County Highway Agency.