US Bridges

Grand Prairie RD over Armenco Branch Canal

Good

Iberia Parish, Louisiana · 0.6 MI N. of LA 675 · Structure no. 032330004915241

Built
1991
34 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
229
2020 count
Owner
County
County Highway Agency

About this bridge

Grand Prairie RD over Armenco Branch Canal is a concrete slab carrying Grand Prairie RD over Armenco Branch Canal in Iberia Parish, Louisiana. It was built in 1991, so it is 34 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 229 vehicles a day, projected to reach 251 by 2040. The structure is 57 ft (17.4 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGrand Prairie RD
CrossesArmenco Branch Canal
Location0.6 MI N. of LA 675
RouteCounty Highway 0
CountyIberia Parish
StateLouisiana
Coordinates30.00782, -91.87283
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating52.5 US tons
Inventory rating40.7 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 width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic229 (2020)
Projected traffic251 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Grand Prairie RD over Armenco Branch Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is Grand Prairie RD over Armenco Branch Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Grand Prairie RD over Armenco Branch Canal carry?

About 229 vehicles per day (2020 count).

How long is Grand Prairie RD over Armenco Branch Canal?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Grand Prairie RD over Armenco Branch Canal?

It is owned by the County Highway Agency.