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.
193 citations across 1,082 inspection hours.
Source: MSHA inspections data, updated weekly.
Imminent-danger orders
ⓘA Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
2
Section 107(a) orders
Most recent order: 2011-11-15.
On record since 2011.
Source: MSHA imminent-danger order records, updated weekly.
Guadalupe has $50K in proposed MSHA penalties and $117 outstanding across 7 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.
$50K
proposed penalties
$41K
current assessed
$41K
paid to date
$117
outstanding
190 assessments are final orders; 7 contested dockets.
Of $24K in penalties contested before the Commission, $14K was upheld in final decisions.
As of the most recent assessment on 2023-06-13.
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.
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.
20citations taken to the federal commission · 10% of citations on record
Settled
14 · 70%
Stood as issued
6 · 30%
79%
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 Vacated and withdrawn citations, and settlements that removed the designation, count against.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 14 decided S&S contests · industry: 79%
41%
Penalty reduction in decided contests
$24K proposed, $14K 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2013-03-14.
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.
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: 2024-08-01
13%
of limit-tested samples over the exposure limit
24
samples
15
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz152 over
Respirable dust, <.1mg8
Nuisance dust, respirable, <1% Qtz1
Show the individual readings (24)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2011-11-15
Quartz, respirable, >1% Qtz
0.88
0.7
1.26
Cleanup Man
2003-03-12
Quartz, respirable, >1% Qtz
0.8
0.73
1.10
Laborer, Bullgang
2024-08-01
Respirable dust, <.1mg
0
Supervisor, Co. Official
2021-02-18
Respirable dust, <.1mg
0
Front-end Loader Operator
2020-07-01
Respirable dust, <.1mg
0
Laborer, Bullgang
2020-07-01
Quartz, respirable, >1% Qtz
0.17
Truck Driver
2016-04-12
Respirable dust, <.1mg
0
Scraper Operator
2016-04-12
Quartz, respirable, >1% Qtz
0.72
1.56
0.46
Crusher Oper/Worker
2016-04-12
Respirable dust, <.1mg
0
Crusher Oper/Worker
2012-05-08
Quartz, respirable, >1% Qtz
0.58
0.75
0.77
Cleanup Man
2011-11-15
Quartz, respirable, >1% Qtz
0.68
0.74
0.92
Cleanup Man
2005-07-06
Quartz, respirable, >1% Qtz
0.18
0.63
0.29
Laborer, Bullgang
2005-07-06
Quartz, respirable, >1% Qtz
0.36
0.62
0.58
Bulldozer Operator
2005-07-06
Quartz, respirable, >1% Qtz
0.14
0.67
0.21
Crusher Oper/Worker
2005-07-06
Quartz, respirable, >1% Qtz
0.29
0.82
0.35
Laborer, Bullgang
2003-03-12
Respirable dust, <.1mg
0
Tractor Operator
2003-03-12
Quartz, respirable, >1% Qtz
0.35
0.7
0.50
Front-end Loader Operator
2003-03-12
Quartz, respirable, >1% Qtz
0.36
0.6
0.60
Laborer, Bullgang
2003-03-12
Respirable dust, <.1mg
0
Crusher Oper/Worker
2001-05-02
Quartz, respirable, >1% Qtz
0.32
0.5
0.64
Bulldozer Operator
2001-05-02
Nuisance dust, respirable, <1% Qtz
0.53
10
0.05
Front-end Loader Operator
2001-05-02
Respirable dust, <.1mg
0
Crusher Oper/Worker
2001-05-02
Quartz, respirable, >1% Qtz
0.25
0.58
0.43
Laborer, Bullgang
2001-05-02
Quartz, respirable, >1% Qtz
0.19
0.45
0.42
Laborer, Bullgang
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.
Guadalupe recorded 0.00 reportable injury cases per 100 full-time workers in 2016.
Injury rate, 2016
ⓘ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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 2.17 and the all-US-mining average was 2.59 cases per 100 workers.
In California, metal and nonmetal mining averaged 2.66 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
2016 *
0.00
0.00
0.000
2015 *
0.00
0.00
0.000
2014 *
0.00
0.00
0.000
2013 *
0.00
0.00
0.000
2012 *
0.00
0.00
0.000
2011 *
0.00
0.00
0.000
2010 *
0.00
0.00
0.000
2009 *
0.00
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
2
2025
1
2024
0
2023
2
2022
2
2021
2
2020
4
2019
5
2018
5
2017
16
2016
18
2015
16
2014
14
2013
15
2012
21
2011
19
2010
16
2009
13
2008
17
2007
4
2006
12
2005
16
2004
14
2003
15
2002
17
2001
18
2000
20
Source: MSHA quarterly employment and production, updated weekly.
Guadalupe sits in San Mateo County, California, where the Census mining category is 0.1% 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 Mateo County, California · Population 745,100
0.1%
Mining share of county employment
$156,000
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
VICTIM WAS TRAVELING DOWN THE PIT ROAD IN SECOND GEAR. WITNESS SAID HE SEEMED TO BE DRVING ERRATICALLY AS HE WAS STRIKING THE BERM. AT A POINT WHERE THE ROAD TURNED, THE TRUCK WENT OVER THE BE RM AND THE PIT WALL. DRIVER WAS RETRIEVED AND TRANSPORTED TO THE HOSPITAL. HE DIED WITHOUT REGAINING CONSCIOUSNESS.
Reportable incidents
48 on file (excluding fatalities above)
2007 · 1 incident
January 15, 2007CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorHANDLING OF MATERIALS
The miner was removing a pin from a dozer blade with a hammer and punch. He misjudged the contact point of the punch, therefore, striking the left pinky finger. Impact caused fracture.
2005 · 1 incident
January 3, 2005CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanMACHINERY
EMPLOYEE WAS USING A 4 1/2"GRINDER. GRINDING ON AIR HP200 CONE CRUSHER HEAD. THE GRINDING WHEEL CAME APART SENDING METAL PIECES IN THE AIR. A PIECE OF FOREIGN BODY ENTERED HIS RT. EYE. EE WAS WEARING EYE PROTECTION W/SIDE SHIELDS.
2004 · 1 incident
March 23, 2004CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
EE WAS DRIVING A WATER TRK SPRAYING WATER. AS HEDROVE NEXT TO A PARKED TRK AT ABOUT 5-10MPH HE LOOKED IN HIS SIDE MIRROR & DROVE INTO THE PARKEDTRK WITH THE SUDDEN STOP HIS LEFT ELBOW SLAMMED INTO THE WIND WINDOW POST & CUT THE ELBOW
EE WAS EXITING HIS WATER TRUCK, AS HE DID HE LOST HIS BALANCE AND SLIPPED. AS HE LANDED ON A RAISED CONCRETE AREA, HE BENT HIS ANKLE CAUSING IT TO BREAK.
1999 · 2 incidents
October 29, 1999CA · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techSLIP OR FALL OF PERSON
EMPLOYEE WAS USING AN OBJECT CALLED A RIPPERSTOOTH TO UNPLUG THE CRUSHER.AS HE WAS TRYING TO UNPLUG THE CRUSHER,HE TRIED TO LIFT OUT THE RIPPERSTOOTH AND BACKED UP IN A HOLE ON THE DECK WHICH CAUSED HIM TO JERK HIS JACK.
EMPL CUTTING BELT AND THE KNIFE SLIPPED AND CUT RIGHT KNEE.
October 11, 1991CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS DRIVING HIS TRUCK AND THE TRUCK LOST ITS STEERING. AGTER LOSING ITS STEERING, THE TRUCK HIT A BERM INJURING THE EMPLOYEE'S NECK AND SHOULDER.
1990 · 2 incidents
May 29, 1990CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerPOWERED HAULAGE
EMPLOYEE WAS STANDING AT THE FINES PILE TRYING TO UNPLUG A HOLE WHEN THE PILE GAVE WAY AND THE EMPLOYEE SLIPPED AND DISLOCATED HIS FINGER AND SPRAINED HIS WRIST.
1989 · 2 incidents
September 28, 1989CA · Metal/Non-Metalfront-end loader, scraper-loader operator, pan operator, payloader, scraper rig operatorPOWERED HAULAGE
EE WAS BUILDING A BERM ON THE SIDE OF THE ROAD. WHILE HE WAS BUILDING THE BERM, HIS LOADER WENT BACKWARDS OFF THE BERM AND EE WAS THROWN FROM THE LOADER.
July 24, 1989CA · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerHANDLING OF MATERIALS
EMPLOYEE WAS BENDING OVER TO SERVICE AND GREASE THE ELECTRIC MOTOR, AND A WIRE HOOK HANGING FROM A CYCLONE FENCE WHICH ACTS AS A GUARD CAUGHT THE CORNER OF HIS LEFT EYE.
1988 · 4 incidents
October 27, 1988CA · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanSLIP OR FALL OF PERSON
EMPLOYEE WAS CLIMBING ROCK PILE.A 6" ROCK FELL OFF OF #5 BELT FROM ABOVE HITTING EMPLOYEE'S BACK CAUSING HIM TO LOSE BLANCE AND FALL DOWN TWISTING HIS RIGHT KNEE.
WHILE OPERATING A 50 TON EUCLID HAUL TRUCK, THE EMPLOYEE CLAIMS HE DROVE THROUGH A CHUCK-HOLE THEREBY INJURING HIS BACK.
March 31, 1988CA · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorSLIP OR FALL OF PERSON
EMPLOYEE WAS WORKING UNDER DIRECTION OF OUTSIDE ELECTRICAL CONTRACTOR WHO WAS DOING REPAIR WORK IN PLANT. THEY WERE PULLING ON ELECTRICAL WIRES AND A GROUND WIRE TOUCHED A LIVE BAR.
April 2, 1984CA · Metal/Non-Metalassayer, geologist, metallurgist, engineer, engineer managementSLIP OR FALL OF PERSON