US Bridges

LA1061 over West Branch

Fair

Tangipahoa Parish, Louisiana · 1.8 M S of LA 1057 · Structure no. 625302780504121

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
1,199
2021 count
Owner
State
State Highway Agency

About this bridge

LA1061 over West Branch is a concrete slab carrying LA1061 over West Branch in Tangipahoa Parish, Louisiana. It was built in 1959, so it is 66 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 6 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 1,199 vehicles a day, roughly 13% of them trucks, projected to reach 1,318 by 2041. The structure is 80 ft (24.4 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesLA1061
CrossesWest Branch
Location1.8 M S of LA 1057
RouteState Highway 1061
CountyTangipahoa Parish
StateLouisiana
Coordinates30.86519, -90.3938
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,199 (2021)
Projected traffic1,318 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 LA1061 over West Branch built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA1061 over West Branch 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 April 2023.

How much traffic does LA1061 over West Branch carry?

About 1,199 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA1061 over West Branch?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA1061 over West Branch?

It is owned by the State Highway Agency.