US Bridges

N Marchand Ave over New River

Fair

Ascension Parish, Louisiana · Gonzales .2 MI West LA 44 · Structure no. 610330145905551

Built
1996
29 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
95 ft
5 main spans
Daily traffic
10
2019 count
Owner
County
County Highway Agency

About this bridge

N Marchand Ave over New River is a concrete slab carrying N Marchand Ave over New River in Ascension Parish, Louisiana. It was built in 1996, so it is 29 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.

It carries about 10 vehicles a day, projected to reach 11 by 2039. The structure is 95 ft (29 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesN Marchand Ave
CrossesNew River
LocationGonzales .2 MI West LA 44
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.23999, -90.92365
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating23.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length95 ft (29 m)
Longest span19 ft (5.8 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2019)
Projected traffic11 by 2039
Trucks—
Lanes on structure3
Traffic directionOne-lane bridge for two-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$333,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Marchand Ave over New River built?

It was built in 1996, making it 29 years old in 2025.

What condition is N Marchand Ave over New River 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 April 2023.

How much traffic does N Marchand Ave over New River carry?

About 10 vehicles per day (2019 count).

How long is N Marchand Ave over New River?

The structure is 95 ft (29 m) long with a longest span of 19 ft (5.8 m) and a deck 30 ft wide.

Who owns N Marchand Ave over New River?

It is owned by the County Highway Agency.