Mining Incidents

LAKESIDE - VIGILANTE AGGREGATES: 94 MSHA citations Metal/Non-Metal

SAN DIEGO, San Diego County, CA  ·  Active
MSHA Mine ID: 0402685

LAKESIDE - VIGILANTE AGGREGATES has $22K in proposed MSHA penalties and $341 outstanding across 2 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
23
Years on record
1986–2020
Latest incident
Mar 2020
Compliance record
MSHA citations since 2000
94
citations
18
significant & substantial
$22,107
proposed penalties
$21,418
paid to date
97% of proposed penalties paid to date, a $689 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
48
inspections on record
892
inspection hours
n/a
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 892 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

LAKESIDE - VIGILANTE AGGREGATES has $22K in proposed MSHA penalties and $341 outstanding across 2 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$22K
proposed penalties
$22K
current assessed
$21K
paid to date
$341
outstanding
93 assessments are final orders; 2 contested dockets.
Of $6K in penalties contested before the Commission, $4K was upheld in final decisions.
As of the most recent assessment on 2026-02-18.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
19.1%
significant & substantial
10.6%
high negligence or reckless
19.1%
reasonably likely or greater
52.1%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 28.7% low, 60.6% moderate, 10.6% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
5 citations taken to the federal commission · 5% of citations on record
  • Settled 2 · 40%
  • Stood as issued 2 · 40%
  • Vacated or withdrawn 1 · 20%
50%
S&S designation survived the contest
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 4 decided S&S contests · industry: 79%
25%
Penalty reduction in decided contests
$6K proposed, $4K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2023-10-05.
Contested penalties
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
Docket Decision Judge Year Proposed / upheld
WEST 2024-0018 Dismissal Simonton 2024 $4K → $4K
WEST 2023-0103 Settlement Simonton 2023 $2K → $614
Source: FMSHRC civil penalty dockets and decisions (public record), updated weekly.
Health sampling
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2025-02-06
0%
of limit-tested samples over the exposure limit
11
samples
2
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg9
  • Quartz, respirable, >1% Qtz2
Show the individual readings (11)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-02-06 Respirable dust, <.1mg 0 Front-end Loader Operator
2019-04-10 Respirable dust, <.1mg 0 Crusher Oper/Worker
2019-04-10 Respirable dust, <.1mg 0 Truck Driver
2016-02-03 Respirable dust, <.1mg 0 Truck Driver
2016-02-03 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-02-03 Respirable dust, <.1mg 0 Cleanup Man
2016-02-03 Respirable dust, <.1mg 0 Mechanic
2005-10-12 Quartz, respirable, >1% Qtz 0.3 0.82 0.37 Laborer, Bullgang
2005-10-12 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-08-15 Respirable dust, <.1mg 0 Front-end Loader Operator
2002-08-15 Quartz, respirable, >1% Qtz 0.14 0.71 0.20 Bulldozer Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.

LAKESIDE - VIGILANTE AGGREGATES recorded 0.00 reportable injury cases per 100 full-time workers in 2025.

Injury rate, 2025
This rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In California, metal and nonmetal mining averaged 1.42 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year total case rate days-away fatal
2025 * 0.00 0.00 0.000
2024 * 0.00 0.00 0.000
2023 * 0.00 0.00 0.000
2022 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 3.47 3.47 0.000
2019 * 0.00 0.00 0.000
2018 * 7.30 0.00 0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Ownership history
  1. Nelson & Sloan 1950 to 1999
  2. Hanson Aggregates Pacific Southwest Inc 1999 to 2021
  3. Martin Marietta San Diego Aggregates, LLC 2021 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 23
2025 21
2024 20
2023 25
2022 25
2021 22
2020 22
2019 24
2018 25
2017 25
2016 18
2015 2
2011 1
2009 9
2008 11
2007 11
2006 11
2005 11
2004 5
2003 12
2002 11
2001 11
2000 12
Source: MSHA quarterly employment and production, updated weekly.

LAKESIDE - VIGILANTE AGGREGATES sits in San Diego County, California, where the Census mining category is 0.0% of county employment.

Local economic context
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
San Diego County, California · Population 3,282,782
0.0%
Mining share of county employment
$102,285
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2026 Q2 10,419 0 0 0.0
2026 Q1 11,829 2 0 169.1
2025 Q4 10,784 0 0 0.0
2025 Q3 9,425 0 0 0.0
2025 Q2 12,360 3 1 242.7
2025 Q1 9,817 0 0 0.0
2024 Q4 10,897 0 0 0.0
2024 Q3 10,077 1 1 99.2
Show 74 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 13,184 0 0 0.0
2024 Q1 11,089 1 0 90.2
2023 Q4 16,360 0 0 0.0
2023 Q3 16,931 2 1 118.1
2023 Q2 16,147 0 0 0.0
2023 Q1 11,416 0 0 0.0
2022 Q4 13,652 7 2 512.7
2022 Q3 14,593 1 0 68.5
2022 Q2 12,651 0 0 0.0
2022 Q1 15,514 2 0 128.9
2021 Q4 14,422 0 0 0.0
2021 Q3 14,605 0 0 0.0
2021 Q2 16,320 1 0 61.3
2021 Q1 14,671 0 0 0.0
2020 Q4 14,287 4 1 280.0
2020 Q3 12,959 0 0 0.0
2020 Q2 13,608 2 0 147.0
2020 Q1 16,711 3 1 179.5
2019 Q4 14,905 0 0 0.0
2019 Q3 15,713 0 0 0.0
2019 Q2 14,257 2 0 140.3
2019 Q1 12,416 3 0 241.6
2018 Q4 13,603 0 0 0.0
2018 Q3 13,528 0 0 0.0
2018 Q2 13,510 3 2 222.1
2018 Q1 14,139 0 0 0.0
2017 Q4 14,589 0 0 0.0
2017 Q3 16,350 0 0 0.0
2017 Q2 15,793 3 0 190.0
2017 Q1 14,804 0 0 0.0
2016 Q4 14,444 2 0 138.5
2016 Q3 13,214 0 0 0.0
2016 Q2 10,919 0 0 0.0
2016 Q1 3,222 0 0 0.0
2015 Q4 1,159 0 0 0.0
2015 Q3 914 0 0 0.0
2011 Q3 340 0 0 0.0
2011 Q2 90 0 0 0.0
2009 Q2 3,592 0 0 0.0
2009 Q1 4,142 1 0 241.4
2008 Q4 5,380 0 0 0.0
2008 Q3 5,685 1 0 175.9
2008 Q2 6,716 5 2 744.5
2008 Q1 7,151 0 0 0.0
2007 Q4 7,352 3 1 408.1
2007 Q3 9,125 0 0 0.0
2007 Q2 9,025 2 0 221.6
2007 Q1 8,843 0 0 0.0
2006 Q4 6,465 0 0 0.0
2006 Q3 5,843 0 0 0.0
2006 Q2 4,822 4 0 829.5
2006 Q1 4,898 0 0 0.0
2005 Q4 6,741 5 0 741.7
2005 Q3 6,531 0 0 0.0
2004 Q4 1,603 0 0 0.0
2004 Q3 1,806 0 0 0.0
2004 Q2 1,840 1 0 543.5
2004 Q1 4,946 0 0 0.0
2003 Q4 9,410 3 0 318.8
2003 Q3 7,360 1 0 135.9
2003 Q2 8,743 0 0 0.0
2003 Q1 10,323 1 0 96.9
2002 Q4 10,067 0 0 0.0
2002 Q3 8,453 2 0 236.6
2002 Q2 9,480 3 0 316.5
2002 Q1 10,389 0 0 0.0
2001 Q4 10,475 0 0 0.0
2001 Q3 9,392 0 0 0.0
2001 Q2 8,583 0 0 0.0
2001 Q1 7,912 0 0 0.0
2000 Q4 7,217 0 0 0.0
2000 Q3 9,701 3 0 309.2
2000 Q2 6,337 10 4 1578.0
2000 Q1 7,599 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

23 on file

2020 · 1 incident

March 3, 2020 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech STEPPING OR KNEELING ON OBJECT
Hanson Aggregates Pacific Southwest Inc · Struck against stationary object

EE was walking under Conveyor PC-12 and slipped when they stepped on a rock. Their right knee jammed when their foot slipped. The EE was offered medical attention and refused at that time. The EE reportedly twisted their knee over the weekend when their foot got stuck in the mud. EE reported twisted knee to their Lead Person on Tuesday 3/24 requesting medical treatment.

2018 · 2 incidents

July 11, 2018 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Over-exertion (Not Elsewhere Classified)

Employee suffered sprain/stain injury when the return roller popped out of place as EE was inserting it into the bracket.

February 1, 2018 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

Employee suffered a neck strain when a sledge hammer head came off of a hammer, striking them on the hardhat. The hammer was being held by another worker as the injured miner was assisting loosening a bolt.

2007 · 3 incidents

September 15, 2007 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Struck by falling object

The employee was removing v-belts from an impact crusher. While removing the v-belts off the sheave, the whole sheave assembly fell off causing the v-belts to pull down weight of the sheave which struck the employee in the face. Initially this injury was first aid only; then the employee was referred to a dentist for further intervention.

August 9, 2007 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer MACHINERY
Hanson Aggregates Pacific Southwest Inc · Struck against a moving object

While operating a dozer the employee felt a sharp pain in his right shoulder and shoulder blade. Initially this was first aid only. Employee terminated 11/06/07 due to work force reduction prior to being released to return to work full duty (right shoulder surgery performed 12/13/07).

2003 · 2 incidents

January 11, 2003 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Hanson Aggregates Pacific Southwest Inc · Caught in, under or between (Not Elsewhere Classified)

WHILE REMOVING A SHAFT AND WHEEL FROM A PAN FEEDER, ONE SIDE OF THE SHAFT SLIPPED OUT OF THE EMPLOYEE'S GRASP CAUSING THE SHAFT TO FALL AND PINCH RIGHT FINGER.

2001 · 1 incident

April 18, 2001 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
Hanson Aggregates Pacific Southwest Inc · Over-exertion (Not Elsewhere Classified)

EE WAS OPERATING A FRONT-END LOADER AND FELT A STRAIN TO HIS LEFT WRIST WHEN HE SHIFTED GEARS.

1999 · 1 incident

October 4, 1999 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Hanson Aggregates Pacific Southwest Inc · Struck by... (Not Elsewhere Classified)

EE WAS USING A HAMMER TO ADJUST RETURN ROLLERS ON A BELT CONVEYOR. HE MISSED THE ROLLER AND STRUCK THUMB. INJURY REQUIRED SUTURES TO CLOSE.

1996 · 1 incident

May 28, 1996 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Nelson & Sloan · Over-exertion in wielding or throwing objects

WHILE EE WAS SWINGING HAMMER, HE EXPERIENCED PAIN IN BACK.

1992 · 1 incident

February 3, 1992 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Nelson & Sloan · Struck by falling object

EMPLOYEE WAS SHOVELING ROCK WHEN A ROCK FELL ONTO SHOULDER CAUSING A CONTUSION TO HIS SHOULDER.

1991 · 2 incidents

February 22, 1991 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Nelson & Sloan · Caught in, under or between a moving and a stationary object

REMOVING ROCK FROM CONVEYOR BELT WHEN ARM GOT STUCK BETWEEN BELT & CONVEYOR RESULTING IN CONTUSION.

February 5, 1991 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Nelson & Sloan · Struck against a moving object

DRIVING TRUCK INNER PLANT AND DROVE UNDER CONVEYOR WITH TRUCK IN UPRIGHT POSITION RESULTING IN NECK PAIN AND BRUISED RIBS FROM THE IMPACT OF THE ACCIDENT.

1990 · 1 incident

July 13, 1990 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Nelson & Sloan · Fall from machine

WHILE CLEANING BELTS,EMPL SLIPPED AND FELL TO GROUND RESULTING IN BRUISED TAILBONE.

1989 · 3 incidents

June 21, 1989 CA · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator MACHINERY
Nelson & Sloan · Struck against a moving object

OPERATING DOZER BACKED OVER WIND-ROW AND RECD WHIPLASH.

March 23, 1989 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Nelson & Sloan · Fall onto or against objects

CHECKING GEAR AT DEEDER FOR NEEDED REPAIRS WHEN FOOT SLIPPED AND LANDED ON PIECE OF STEEL -RESULTED IN A HERNIA.

January 11, 1989 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Nelson & Sloan · Struck by falling object

CLEANING CATWALK ON CONVEYOR BELT WITH SHOVEL,ROCK FELL ONTO RIGHT FOOT RESULTING IN BROKEN TOES

1987 · 1 incident

June 22, 1987 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Nelson & Sloan · Contact with hot objects or substances

USING CUTTING T2RCH. HOSE WAS CUAGHT ON ROCK EMPLOYEE JERKED HOSE, HOSE CAME LOOSE AND TORCH BURNED BACK OF HIS HAND. 2ND DEGREE BURN ON BACK OF RIGHT HAND.

1986 · 4 incidents

October 28, 1986 CA · Metal/Non-Metal ledgeman/hand, quarry man HANDTOOLS (NONPOWERED)
Nelson & Sloan · Struck by flying object

CHIPPING ROCK O6T OF GRIZZLIE CHIP OF ROCK FLEW OFF AND HIT WORKER IN LEFT EYE

October 9, 1986 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Nelson & Sloan · Struck by... (Not Elsewhere Classified)

REMOVING LARGE 9OCK FROM HOPPER WITH A ELECTRIC WRENCH. WRENCH BROKE WRENCH WHIPPED SHEARED SAFTEY LOCK ON MOUNTING WRENCH FELL STRICKING EMPLOYEE ON TOP OF LEFT HAND BROKE TWO SMALL BONES. LL BONES IN BAC5 OF LEFT HAND.

October 8, 1986 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Nelson & Sloan · Struck by... (Not Elsewhere Classified)

CHECKING FAN BE5T ON A DIESEL POWERED HYDRALIC UNIT. PERSON ASSISTING HIM STARTED ENGINE WITH OUT CHECKING TO SEE IF ALL CLEAR HAND WANT THRU PULLEY.

September 29, 1986 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Nelson & Sloan · Struck by... (Not Elsewhere Classified)

CONYVEOR SAFETY3SWITCH HAD BEEN DE ACTIVATED.EMPLOYEE WAS TOLD TO REACTIVATE SAFETY SWITCH AFTER CUTTING SWITCH PLANT OPERATOR STARTED BELT EMPLOYEE WAS THROWN OFF BELT INTO COLECT WOPPER.EMPL YEE HAS BRUISES3AND MISSED TWO DAYS WORK.