US Bridges

LA0679 over Bayou De Portage

Fair

Iberia Parish, Louisiana · 2.53 MI North of LA 345 · Structure no. 032304020202531

Built
1972
53 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
95 ft
4 main spans
Daily traffic
1,590
2021 count
Owner
State
State Highway Agency

About this bridge

LA0679 over Bayou De Portage is a concrete slab carrying LA0679 over Bayou De Portage in Iberia Parish, Louisiana. It was built in 1972, so it is 53 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.

It carries about 1,590 vehicles a day, roughly 12% of them trucks, projected to reach 1,749 by 2041. The structure is 95 ft (29 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0679
CrossesBayou De Portage
Location2.53 MI North of LA 345
RouteState Highway 679
CountyIberia Parish
StateLouisiana
Coordinates30.12221, -91.72658
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length95 ft (29 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,590 (2021)
Projected traffic1,749 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 LA0679 over Bayou De Portage built?

It was built in 1972, making it 53 years old in 2025.

What condition is LA0679 over Bayou De Portage 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 August 2024.

How much traffic does LA0679 over Bayou De Portage carry?

About 1,590 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0679 over Bayou De Portage?

The structure is 95 ft (29 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0679 over Bayou De Portage?

It is owned by the State Highway Agency.