US Bridges

S Purpera Ave over Francois Lat

FairPosted for load

Ascension Parish, Louisiana · 0.04 Mi. N. of LA 30 · Structure no. 610330130905411

Built
1976
49 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete
Length
39 ft
2 main spans
Daily traffic
750
2019 count
Owner
County
County Highway Agency

About this bridge

S Purpera Ave over Francois Lat is a concrete slab carrying S Purpera Ave over Francois Lat in Ascension Parish, Louisiana. It was built in 1976, so it is 49 years old, older 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 750 vehicles a day, projected to reach 825 by 2039. The structure is 39 ft (11.9 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS Purpera Ave
CrossesFrancois Lat
Location0.04 Mi. N. of LA 30
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.21699, -90.90397
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2019)
Projected traffic825 by 2039
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

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$163,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S Purpera Ave over Francois Lat built?

It was built in 1976, making it 49 years old in 2025.

What condition is S Purpera Ave over Francois Lat 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 January 2023.

How much traffic does S Purpera Ave over Francois Lat carry?

About 750 vehicles per day (2019 count).

How long is S Purpera Ave over Francois Lat?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns S Purpera Ave over Francois Lat?

It is owned by the County Highway Agency.