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Diamond Quarry Metal/Non-Metal

Sierra Rock LLC · Surface

Controlled by Linda S Brunius; Eric T Brunius

Placerville, El Dorado County, CA · Active

MSHA Mine ID: 0404031

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Email me when a new MSHA incident is filed at Diamond Quarry.

Fatalities: 0
Total incidents: 3
Years on record: 2002–2005
Latest incident: Mar 2005

Compliance record

MSHA citations since 2000

289

citations

significant & substantial

$102,201

proposed penalties

$45,359

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	4,981	1	0	200.8
2025 Q3	4,741	0	0	0.0
2025 Q2	4,821	2	0	414.9
2025 Q1	3,449	0	0	0.0
2024 Q4	5,807	0	0	0.0
2024 Q3	4,448	0	0	0.0
2024 Q2	3,876	3	1	774.0
2024 Q1	2,501	0	0	0.0

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

No fatalities recorded at this mine.

Reportable incidents

3 on file

2005 · 1 incident

March 30, 2005 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS

Sierra Rock · Over-exertion in pulling or pushing objects

EE WAS INSTALLING A HYDRAULIC HOSE ON A 560 LOADER. EE PULLED ON THE HOSE AND FELT PAIN IN HIS WRIST; HAD SLIGHT SWELLING IMMEDIATELY. EE DID NOT INFORM ANYONE UNITL FRIDAY, 4/1/05 & EE REFUSED TO SEE DOCTOR. ON MONDAY, 4/4/05, EE STILL COMPLAINED OF PAIN, BUT STILL REFUSED TO SEE DOCTOR. ON TUESDAY, 4/5/05, EE ASKED TO SEE DOCTOR. TAKEN TO DOCTOR 4/6/05.

2003 · 1 incident

October 21, 2003 CA · Metal/Non-Metal welder (shop) HANDLING OF MATERIALS

Sierra Rock · Over-exertion in lifting objects

EMPLOYEE STATES HE RAN OUT OF ACETYINE ON WELDING TRUCK WHILE WORKING ON PROJECT. TOOK OUT EMPTY TANK AND WENT TO LIFT IN A FULL ONE, ALONE. WHILE LIFTING, FELT PAIN IN LOWER BACK. DID NOT REPORT INJURY TO SAFETY COORDINATOR UNTIL AFTER NOON ON 10/22. CAME IN TO WORK ON 10/23. LEFT EARLY BECAUSE OF BACK PAIN. DID NOT COME IN 10/24. DR DIAGNOSED LOWER BACK MUSCLE STRAIN.

2002 · 1 incident

March 19, 2002 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS

Sierra Rock · Struck by falling object

EMPLOYEE WAS STRUCK IN THE HEAD BY A ROCK WHILE RETRIEVING AN AIR LINE UNDER THE HOPPER. HE WAS WEARING A HARD HAT.