US Bridges

LA0471 over Dartigo Creek

Fair

Grant Parish, Louisiana · 0.97 Mi. North of LA 122 · Structure no. 082201230200971

Built
1982
43 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
114 ft
6 main spans
Daily traffic
673
2021 count
Owner
State
State Highway Agency

About this bridge

LA0471 over Dartigo Creek is a concrete slab carrying LA0471 over Dartigo Creek in Grant 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 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 673 vehicles a day, roughly 14% of them trucks, projected to reach 740 by 2041. The structure is 114 ft (34.7 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesLA0471
CrossesDartigo Creek
Location0.97 Mi. North of LA 122
RouteState Highway 471
CountyGrant Parish
StateLouisiana
Coordinates31.70668, -92.7642
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length114 ft (34.7 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 traffic673 (2021)
Projected traffic740 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 LA0471 over Dartigo Creek built?

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

What condition is LA0471 over Dartigo Creek 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 July 2024.

How much traffic does LA0471 over Dartigo Creek carry?

About 673 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0471 over Dartigo Creek?

The structure is 114 ft (34.7 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0471 over Dartigo Creek?

It is owned by the State Highway Agency.