LA0460 over Doyle Branch

Good

La Salle Parish, Louisiana · 6.0 MI East of LA 127 · Structure no. 583001520106001

Built: 1978; 47 years old
Condition: Good; inspected October 2023
Type: Slab; Concrete
Length: 38 ft; 2 main spans
Daily traffic: 776; 2021 count
Owner: State; State Highway Agency

About this bridge

LA0460 over Doyle Branch is a concrete slab carrying LA0460 over Doyle Branch in La Salle Parish, Louisiana. It was built in 1978, so it is 47 years old, older 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 776 vehicles a day, roughly 15% of them trucks, projected to reach 853 by 2041. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesLA0460

CrossesDoyle Branch

Location6.0 MI East of LA 127

RouteState Highway 460

CountyLa Salle Parish

StateLouisiana

Coordinates31.61791, -92.0612

Functional classRural Minor Collector

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionOctober 2023

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 adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating69 US tons

Inventory rating41 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, precast panels

Main spans2

Design loadHS 20

Structure length38 ft (11.6 m)

Longest span19 ft (5.8 m)

Deck width32 ft (9.8 m)

Roadway width29 ft (8.7 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic776 (2021)

Projected traffic853 by 2041

Trucks15%

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 LA0460 over Doyle Branch built?

It was built in 1978, making it 47 years old in 2025.

What condition is LA0460 over Doyle Branch 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 2023.

How much traffic does LA0460 over Doyle Branch carry?

About 776 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0460 over Doyle Branch?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 32 ft wide.

Who owns LA0460 over Doyle Branch?

It is owned by the State Highway Agency.