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Kauai Aggregates Metal/Non-Metal

Kauai Aggregates · Surface

Controlled by O Thronas Incorporated; Priscilla K Thronas

Lihue, Kauai County, HI · Active

MSHA Mine ID: 5100190

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Email me when a new MSHA incident is filed at Kauai Aggregates.

Fatalities: 0
Total incidents: 6
Years on record: 2013–2025
Latest incident: Nov 2025

Compliance record

MSHA citations since 2000

210

citations

significant & substantial

$94,046

proposed penalties

$90,737

paid to date

Source: MSHA violations data, updated weekly.

Quarterly safety rates

Citations per million employee-hours, as reported to MSHA

Quarter	Hours worked	Citations	S&S	Per 1M hrs
2025 Q4	9,478	0	0	0.0
2025 Q3	6,627	0	0	0.0
2025 Q2	7,755	2	0	257.9
2025 Q1	6,846	0	0	0.0
2024 Q4	8,907	1	0	112.3
2024 Q3	7,791	0	0	0.0
2024 Q2	9,305	2	0	214.9
2024 Q1	7,481	1	1	133.7

Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.

No fatalities recorded at this mine.

Reportable incidents

6 on file

2025 · 1 incident

November 11, 2025 HI · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY

Kauai Aggregates · Struck by... (Not Elsewhere Classified)

The employee was helping a mechanic repair a piece of equipment. While holding the nut on one side of a bolt, the mechanic tightened the bolt from the opposite end. The employee did not maintain a secure grip on the bolt, resulting in the bolt slicing the side of their right middle finger.

2024 · 1 incident

January 22, 2024 HI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS

Kauai Aggregates · Struck against stationary object

While doing maintenance on an Excavator and trying to unscrew a bolt, employee's left arm caught onto a piece of metal causing a 6-8 cm laceration to the left distal forearm.

2021 · 1 incident

July 30, 2021 HI · Metal/Non-Metal quality control technician, laboratory technician, laboratory assistant SLIP OR FALL OF PERSON

Kauai Aggregates · Fall from machine

Employee was assisting a team of 5 with moving of conveyor belts to a different area within our property. Employee climbed onto conveyor belt #2 to guide the operator with conveyor #1. While moving, Conveyor #1 got caught on a rock and swung back hitting conveyor #2, causing Employee to fall.

2016 · 1 incident

December 13, 2016 HI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech DISORDERS (REPEATED TRAUMA)

Kauai Aggregates · (Not Elsewhere Classified)

We were notified by hearing testing technician that one of our miners had hearing loss in both ears necessitating a baseline revision.

2015 · 1 incident

July 8, 2015 HI · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON

Kauai Aggregates · Over-exertion (Not Elsewhere Classified)

The employee jumped off of a feeder hopper into the rocks and twisted and bruised his knee. No bones were broke and nothing was tore in the knee, just bad bruising.

2013 · 1 incident

August 28, 2013 HI · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY

Kauai Aggregates · Fall from machine

A conveyor belt had been set on the ground by lifting equipment, the employee went onto the belt of the conveyor to unhook the lifting chains, the lifting equipment subsequently bumped the conveyor while the employee was till on the conveyor belt, and the employee fell onto the ground.