US Bridges

LA0431 over New River

Poor

Ascension Parish, Louisiana · 1.37 MI NE JCT US 61 · Structure no. 610302670201371

Built
1982
43 years old
Condition
Poor
inspected October 2023
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
9,608
2021 count
Owner
State
State Highway Agency

About this bridge

LA0431 over New River is a concrete slab carrying LA0431 over New River in Ascension Parish, Louisiana. It was built in 1982, so it is 43 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 9,608 vehicles a day, roughly 7% of them trucks, projected to reach 10,568 by 2041. The structure is 57 ft (17.4 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0431
CrossesNew River
Location1.37 MI NE JCT US 61
RouteState Highway 431
CountyAscension Parish
StateLouisiana
Coordinates30.22586, -90.86957
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,608 (2021)
Projected traffic10,568 by 2041
Trucks7%
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

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 LA0431 over New River built?

It was built in 1982, making it 43 years old in 2025.

What condition is LA0431 over New River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does LA0431 over New River carry?

About 9,608 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is LA0431 over New River?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 43 ft wide.

Who owns LA0431 over New River?

It is owned by the State Highway Agency.