Mining Incidents

Santa Margarita Aggregates Metal/Non-Metal

Santa Margarita, San Luis Obispo County, CA  ·  Active
MSHA Mine ID: 0401616

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Fatalities
0
Total incidents
14
Years on record
2004–2022
Latest incident
Aug 2022
Compliance record
MSHA citations since 2001
163
citations
42
significant & substantial
$103,691
proposed penalties
$103,342
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 5,113 0 0 0.0
2025 Q3 1,040 2 0 1923.1
2025 Q1 4,460 0 0 0.0
2024 Q4 4,339 0 0 0.0
2024 Q3 1,040 1 0 961.5
2024 Q2 938 0 0 0.0
2024 Q1 4,107 2 1 487.0
2023 Q4 5,134 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

14 on file

2022 · 1 incident

August 26, 2022 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Martin Marietta Northern California Aggregates,LLC · Fall to the walkway or working surface

The employee had just finished the post-trip inspection of equipment they operated at the Santa Margarita Quarry. The employee wanted to check out the new frontend loader, so they started to walk around the and look at the new equipment. The new loader was backed into a cutout to prevent the equipment from moving and the employee stepped into the cutout and slipped and fell.

2021 · 1 incident

December 7, 2021 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
Martin Marietta Northern California Aggregates,LLC · Fall onto or against objects

Employee was cutting metal with a torch which was supported on sawhorses. The employee moved one sawhorse and continued to use the torch to cut the metal. The employee turned to make a step and tripped over the sawhorse that they had moved earlier. The employee fell and landed on their right shoulder.

2017 · 1 incident

June 27, 2017 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver MACHINERY
Martin Marietta Northern California Aggregates,LLC · Caught in, under or between running or meshing objects

Miner/employee was drilling a piece of angle iron in the area of the Feed tunnel belt area when the hand drill being used twisted in their right hand resulting in a sprain to their right ring finger. Miner/employee did not report or seek medical attention until 07/12/2017.

2015 · 2 incidents

September 30, 2015 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Martin Marietta Northern California Aggregates,LLC · Caught in, under or between a moving and a stationary object

Employee received an open fracture on the tip of his left index finger while placing the main shaft sleeve on the crusher. His finger was caught between the main shaft sleeve and the mantle of the crusher when the lifting eye was removed before the sleeve was set in place and employee had not removed his finger. He required 3 stitches on the tip of his finger.

March 23, 2015 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Martin Marietta Northern California Aggregates,LLC · Caught in, under or between a moving and a stationary object

Employee and co-worker were moving steel bars onto the fork of a telelift. One bar slipped catching the employee's glove on a piece of broken weld causing his left thumb to be caught between 2 bars. Employee sustained a deep cut and a bone chipped in his left requiring 5 stitches, splint and medication.

2013 · 2 incidents

June 6, 2013 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Martin Marietta Northern California Aggregates,LLC · Struck against a moving object

Haul truck driver was dumping a load of rock at the stockpile. His telescopic hydraulic ram on the dump bed broke off at the 3rd stage causing the bed to slam down on the frame of truck, shaking driver giving him strained neck and shoulder muscles.

February 4, 2013 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator OTHER

We are denying this claim. EE was on medical leave for COPD and he filed for Cal State Disability after his doctor told him his illness was not work related. After 2 months of not receiving any money from the State of California, he was told the claims are backed up. This is when he filed workman's compensation claim.

2010 · 1 incident

September 28, 2010 CA · Metal/Non-Metal water truck operator OTHER
Martin Marietta Northern California Aggregates,LLC · Absorption of radiations, caustics, toxic and noxious substances

While filling his water truck in the quarry, a bee stung the injured employee in the back of the neck.

2008 · 2 incidents

2007 · 1 incident

March 12, 2007 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Martin Marietta Northern California Aggregates,LLC · Caught in, under or between (Not Elsewhere Classified)

While cleaning out the dust from inside an air conditioning air vent deflector without turning the equipment off, the employee's finger was cut by a rotating blade.

2005 · 2 incidents

November 15, 2005 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDTOOLS (NONPOWERED)
Hanson Aggregates West Inc · Over-exertion (Not Elsewhere Classified)

While tightening a bolt on a jaw crusher, the employee felt a twinge to his back.

September 26, 2005 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Hanson Aggregates West Inc · Struck against a moving object

Employee was being loaded. Loader backed up before bucket was clear. Truck leaned back then released, rocking it sideways causing injury to employee's back.

2004 · 1 incident

January 6, 2004 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator POWERED HAULAGE
Hanson Aggregates West Inc · Struck against a moving object

EMPLOYEE COMPLAINED OF BACK PAIN WHILE OPERATING #5114 LOADER.