LA0016 over Coon Branch

Fair

Tangipahoa Parish, Louisiana · 0.64M E ST Helena Ph Line · Structure no. 625302620700641

Built: 1992; 33 years old
Condition: Fair; inspected March 2023
Type: Slab; Concrete
Length: 100 ft; 5 main spans
Daily traffic: 4,942; 2021 count
Owner: State; State Highway Agency

About this bridge

LA0016 over Coon Branch is a concrete slab carrying LA0016 over Coon Branch in Tangipahoa Parish, Louisiana. It was built in 1992, so it is 33 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 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 4,942 vehicles a day, roughly 11% of them trucks, projected to reach 5,436 by 2041. The structure is 100 ft (30.5 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesLA0016

CrossesCoon Branch

Location0.64M E ST Helena Ph Line

RouteState Highway 16

CountyTangipahoa Parish

StateLouisiana

Coordinates30.72108, -90.5577

Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMarch 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 geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating75 US tons

Inventory rating45 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, cast-in-place

Main spans5

Design loadHS 20

Structure length100 ft (30.5 m)

Longest span20 ft (6.1 m)

Deck width43 ft (13 m)

Roadway width40 ft (12.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,942 (2021)

Projected traffic5,436 by 2041

Trucks11%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed98.8 mi (159 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 LA0016 over Coon Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is LA0016 over Coon 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 March 2023.

How much traffic does LA0016 over Coon Branch carry?

About 4,942 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0016 over Coon Branch?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0016 over Coon Branch?

It is owned by the State Highway Agency.