Mining Incidents

Santan Pit: 1 recorded fatality Metal/Non-Metal

Sacaton, Pinal County, AZ  ·  Active
MSHA Mine ID: 0202116

Santan Pit has $52K in proposed MSHA penalties and $151 outstanding across 10 contested dockets, plus health sampling and the full incident record.

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Fatalities
1
Total incidents
17
Years on record
1985–2026
Latest incident
Apr 2026
Compliance record
MSHA citations since 2000
144
citations
32
significant & substantial
$51,533
proposed penalties
$49,170
paid to date
95% of proposed penalties paid to date, a $2,363 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
67
inspections on record
1,159
inspection hours
12.4
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.
144 citations across 1,159 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.
1
Section 107(a) orders
Most recent order: 2022-08-31.
On record since 2022.
Source: MSHA imminent-danger order records, updated weekly.

Santan Pit has $52K in proposed MSHA penalties and $151 outstanding across 10 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.
$52K
proposed penalties
$49K
current assessed
$49K
paid to date
$151
outstanding
139 assessments are final orders; 10 contested dockets.
Of $86K in penalties contested before the Commission, $8K was upheld in final decisions.
As of the most recent assessment on 2026-03-19.
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.
22.4%
significant & substantial
3.5%
high negligence or reckless
20.3%
reasonably likely or greater
47.6%
permanently disabling or fatal if injury occurs
Negligence coding: 2.1% none, 5.6% low, 88.8% moderate, 3.5% 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.
23 citations taken to the federal commission · 16% of citations on record
  • Settled 10 · 43%
  • Stood as issued 5 · 22%
  • Vacated or withdrawn 7 · 30%
  • Still open 1 · 4%
80%
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 10 decided S&S contests · industry: 79%
33%
Penalty reduction in decided contests
$11K proposed, $8K 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 2026-05-31.
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
WEST20010180M Dismissal 2001 $75K → $0
WEST 2010-736M Settlement Lesnick 2010 $4K → $3K
WEST 2023-0068 Withdrawal Manning 2023 $3K → $2K
WEST 2015-0288 Dismissal Lesnick 2015 $2K → $2K
WEST 2014-0910 Settlement Lesnick 2015 $1K → $600
WEST 2020-0322 Settlement Manning 2020 $615 → $615
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: 2024-12-11
11%
of limit-tested samples over the exposure limit
23
samples
9
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz91 over
  • Respirable dust, <.1mg13
  • Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (23)
Date Contaminant Concentration Limit Conc / limit Occupation
2023-03-21 Quartz, respirable, >1% Qtz 0.33 0.31 1.06 Laborer, Bullgang
2024-12-11 Respirable dust, <.1mg 0 Truck Driver
2024-12-11 Quartz, respirable, >1% Qtz 0.13 0.54 0.24 Laborer, Bullgang
2024-12-11 Respirable dust, <.1mg 0 Laborer, Bullgang
2024-12-11 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-03-21 Quartz, respirable, >1% Qtz 0.19 0.35 0.54 Laborer, Bullgang
2023-03-21 Respirable dust, <.1mg 0 Crusher Oper/Worker
2021-05-25 Quartz, respirable, >1% Qtz 0.34 0.39 0.87 Crusher Oper/Worker
2021-05-25 Respirable dust, <.1mg 0 Washer Operator
2021-05-25 Respirable dust, <.1mg 0 Truck Driver
2021-05-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2018-12-04 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-12-04 Quartz, respirable, >1% Qtz 0.29 0.47 0.62 Crusher Oper/Worker
2018-12-04 Respirable dust, <.1mg 0 Crusher Oper/Worker
2018-12-04 Quartz, respirable, >1% Qtz 0.32 0.47 0.68 Crusher Oper/Worker
2015-10-09 Quartz, respirable, >1% Qtz 0.31 0.7 0.44 Cleanup Man
2015-10-09 Quartz, respirable, >1% Qtz 0.13 1.22 0.11 Cleanup Man
2013-12-04 Respirable dust, <.1mg 0 Laborer, Bullgang
2013-12-04 Unlisted Particulate, respirable, <1% Qtz 0.14 Mechanic
2013-12-04 Respirable dust, <.1mg 0 Washer Operator
2010-11-09 Quartz, respirable, >1% Qtz 0.2 0.55 0.36 Crusher Oper/Worker
2010-11-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2010-11-09 Respirable dust, <.1mg 0 Washer 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.

Santan Pit recorded 4.80 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.
4.80
total case rate
2.40
days-away rate
0.000
fatality rate
Above 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 Arizona, metal and nonmetal mining averaged 1.81 cases per 100 workers that year.
Year total case rate days-away fatal
2025 4.80 2.40 0.000
2024 0.00 0.00 0.000
2023 0.00 0.00 0.000
2022 0.00 0.00 0.000
2021 1.27 0.00 0.000
2020 1.35 0.00 0.000
2019 1.32 0.00 0.000
2018 0.00 0.00 0.000
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. Tanner Companies 1982 to 1987
  2. Tanner Companies 1987 to 1994
  3. United Metro Materials Inc 1994 to 2002
  4. Gila River Sand & Gravel Corporation 2002 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 93
2025 89
2024 92
2023 85
2022 78
2021 77
2020 77
2019 78
2018 72
2017 67
2016 73
2015 73
2014 70
2013 66
2012 56
2011 44
2010 44
2009 51
2008 57
2007 66
2006 56
2005 40
2004 39
2003 26
2002 30
2001 33
2000 27
Source: MSHA quarterly employment and production, updated weekly.

Santan Pit sits in Pinal County, Arizona, where the Census mining category is 0.8% 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.
Pinal County, Arizona · Population 449,219
0.8%
Mining share of county employment
$77,588
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 45,420 0 0 0.0
2026 Q1 40,585 1 0 24.6
2025 Q4 42,638 0 0 0.0
2025 Q3 40,690 2 0 49.2
2025 Q2 42,682 0 0 0.0
2025 Q1 40,554 0 0 0.0
2024 Q4 42,575 1 0 23.5
2024 Q3 42,184 3 3 71.1
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 45,962 0 0 0.0
2024 Q1 43,439 1 0 23.0
2023 Q4 43,728 0 0 0.0
2023 Q3 43,696 2 0 45.8
2023 Q2 42,387 0 0 0.0
2023 Q1 40,216 2 0 49.7
2022 Q4 42,970 0 0 0.0
2022 Q3 39,525 5 2 126.5
2022 Q2 38,163 0 0 0.0
2022 Q1 31,880 0 0 0.0
2021 Q4 37,620 4 1 106.3
2021 Q3 34,496 0 0 0.0
2021 Q2 51,435 1 0 19.4
2021 Q1 33,571 2 0 59.6
2020 Q4 40,060 0 0 0.0
2020 Q3 36,023 0 0 0.0
2020 Q2 35,922 0 0 0.0
2020 Q1 36,383 3 1 82.5
2019 Q4 39,238 0 0 0.0
2019 Q3 37,885 2 1 52.8
2019 Q2 38,287 0 0 0.0
2019 Q1 35,553 0 0 0.0
2018 Q4 37,833 3 1 79.3
2018 Q3 35,641 0 0 0.0
2018 Q2 34,046 1 0 29.4
2018 Q1 29,644 0 0 0.0
2017 Q4 29,269 0 0 0.0
2017 Q3 28,631 0 0 0.0
2017 Q2 28,341 1 0 35.3
2017 Q1 28,649 0 0 0.0
2016 Q4 28,127 4 0 142.2
2016 Q3 30,338 0 0 0.0
2016 Q2 31,467 0 0 0.0
2016 Q1 29,126 0 0 0.0
2015 Q4 31,914 2 0 62.7
2015 Q3 29,146 8 3 274.5
2015 Q2 29,121 0 0 0.0
2015 Q1 29,339 0 0 0.0
2014 Q4 28,132 4 1 142.2
2014 Q3 28,397 0 0 0.0
2014 Q2 28,404 8 1 281.7
2014 Q1 27,309 0 0 0.0
2013 Q4 27,152 6 1 221.0
2013 Q3 28,642 0 0 0.0
2013 Q2 34,051 6 2 176.2
2013 Q1 25,793 3 1 116.3
2012 Q4 26,840 0 0 0.0
2012 Q3 24,999 1 0 40.0
2012 Q2 22,951 0 0 0.0
2012 Q1 20,171 0 0 0.0
2011 Q4 18,596 1 0 53.8
2011 Q3 20,137 8 2 397.3
2011 Q2 19,149 0 0 0.0
2011 Q1 17,683 0 0 0.0
2010 Q4 19,523 2 0 102.4
2010 Q3 18,701 1 0 53.5
2010 Q2 19,047 0 0 0.0
2010 Q1 17,396 0 0 0.0
2009 Q4 20,102 3 1 149.2
2009 Q3 21,306 0 0 0.0
2009 Q2 20,443 3 0 146.7
2009 Q1 22,327 0 0 0.0
2008 Q4 25,031 1 0 40.0
2008 Q3 26,424 13 3 492.0
2008 Q2 29,640 0 0 0.0
2008 Q1 31,852 0 0 0.0
2007 Q4 36,529 0 0 0.0
2007 Q3 35,121 5 1 142.4
2007 Q2 33,428 4 1 119.7
2007 Q1 33,085 0 0 0.0
2006 Q4 30,891 5 1 161.9
2006 Q3 29,350 0 0 0.0
2006 Q2 29,529 0 0 0.0
2006 Q1 27,927 2 0 71.6
2005 Q4 26,871 0 0 0.0
2005 Q3 14,968 0 0 0.0
2005 Q2 25,210 0 0 0.0
2005 Q1 24,012 0 0 0.0
2004 Q4 19,536 0 0 0.0
2004 Q3 22,189 0 0 0.0
2004 Q2 14,359 0 0 0.0
2004 Q1 15,911 0 0 0.0
2003 Q4 20,586 0 0 0.0
2003 Q3 41,620 5 2 120.1
2003 Q2 23,298 0 0 0.0
2003 Q1 2,502 0 0 0.0
2002 Q4 18,450 0 0 0.0
2002 Q3 14,615 0 0 0.0
2002 Q2 17,103 0 0 0.0
2002 Q1 14,117 0 0 0.0
2001 Q4 18,067 2 2 110.7
2001 Q3 20,791 0 0 0.0
2001 Q2 21,136 0 0 0.0
2001 Q1 17,522 0 0 0.0
2000 Q4 17,503 0 0 0.0
2000 Q3 17,480 6 0 343.2
2000 Q2 15,910 0 0 0.0
2000 Q1 14,435 0 0 0.0

Fatalities at this mine

1 recorded
August 9, 1999 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman Fatality · POWERED HAULAGE
United Metro Materials Inc · Caught in, under or between running or meshing objects

ACCIDENT REMAINS UNDER INVESTIGATION. NO EYEWITNESS TO INCIDENT. EMPLOYEE'S DUTIES INCLUDED CLEANING SPILLS ON FLOOR UNDER SHAKER SCREEN. TASK CAN BE ACCOMPLISHED FROM A SAFE LOCATION AND IN C ONFORMANCE WITH SAFETY REQUIREMENTS. NEVERTHELESS, EMPLOYEE APPEARS TO HAVE ENTERED INTO OR ONTO EQUIPMENT FOR SOME UNKNOWN REASON, AT WHICH TIME THE EE, IS CLOTHING OR A TOOL APPARENTLY CONT

Reportable incidents

16 on file (excluding fatalities above)

2026 · 1 incident

April 1, 2026 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Gila River Sand & Gravel Corporation · Struck by falling object

crusher operator shut down stalker #18 overloaded with material. Climbed up a ladder, loosened nut from a guard that needed to be removed for cleaning. EE used a shovel to pull the guard down, it fell and got caught up with the guard underneath, fell and struck hard hat, then right shoulder causing a laceration on right shoulder. Took EE in for medical where EE received 4 stiches.

2025 · 4 incidents

December 6, 2025 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Gila River Sand & Gravel Corporation · Fall onto or against objects

Had gone to get a tool, walking across the concrete pad between the crush and feeder, fell off the concrete slab. When EE fell EE scaped right knee, ripped my pants and scaped my knee.

July 31, 2025 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Gila River Sand & Gravel Corporation · Struck by... (Not Elsewhere Classified)

Employee standing on the 6X catwalk cutting crown rubber to place in 6X shaker. Finger in glove in it ended up in the path of the blade, cut through Maxo flex gloves

July 21, 2025 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver SLIP OR FALL OF PERSON

Tried to get down from haul truck, missed step fell on right hip and hit back of head on the ground.

February 11, 2025 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Gila River Sand & Gravel Corporation · Struck by... (Not Elsewhere Classified)

Employee had tied EE's sweater with a zip tie and used a blade for cutting. When EE was cutting EE pointed the blade toward EE's body and cut EE's hand. EE should have pointed the blade away from body to prevent this incident.

2021 · 1 incident

August 12, 2021 AZ · Metal/Non-Metal dry screening plant operator, screen house operator SLIP OR FALL OF PERSON
Gila River Sand & Gravel Corporation · Fall to the walkway or working surface

Walking up to wash plant between the 1/2" belt and 3/4" belt and walked under 7X20 shaker slowly because of algae build up on concrete floor, slipped and fell back, hitting head. Got up and saw blood on shirt and then reported to shift foreman. EE taken up to scale house and applied clean gauze and pressure to stop bleeding. Taken to hospital, received surgical staples.

2020 · 1 incident

April 9, 2020 AZ · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Gila River Sand & Gravel Corporation · Struck by falling object

Doing a liner change, installing wear plates on inside of tub of the K400 crusher, EE was in bottom of tub aligning wear plate. A jack was installed from cone head to the wear plate to get it ready for welding. Everything was in place and when they let it go, the jack gave out causing the plate to come down landing on EE's left hand, causing the injury.

2019 · 1 incident

February 22, 2019 AZ · Metal/Non-Metal water truck operator HANDLING OF MATERIALS
Gila River Sand & Gravel Corporation · Struck by falling object

EE went to the wash plant to look for some rubber boots. In the floc room ee found them located at the bottom shelf: there was a spray bar laying across. With left hand ee held on to the shelf and pulled the boots out. The bar came down and smashed hand. The metal strap on bar cut left middle finger. Spray bar was a 6.5' x 1.5" side strap.

2016 · 2 incidents

November 10, 2016 AZ · Metal/Non-Metal trespasser OTHER
Gila River Sand & Gravel Corporation · Unclassified, insufficient data

Not an EE, incident occurred inside plant's property line. An EE noticed fire, thinking it was a brush fire, then noticed a vehicle halfway engulfed with fire. Called 911 and fire dept. and safety manager. After fire was extinguished fire and police dept. determined there was a body of a male, No positive ID, no cause as of yet and under investigation. MSHA called at 6:27pm.

July 1, 2016 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Gila River Sand & Gravel Corporation · Struck by... (Not Elsewhere Classified)

While cutting a 48 inch length rail rubber down to 45 inches, employee held the rail rubber with left hand. EE made the cut with a utility knife with right hand and over cut the rail rubber into work glove and as a result, lacerated left hand, outside palm. The laceration was 1.5 inches long and received minimal injury with sutures.

2013 · 1 incident

January 5, 2013 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator MACHINERY
Gila River Sand & Gravel Corporation · Struck by... (Not Elsewhere Classified)

Employee was grinding when the grinder hit a burr and jumped and knicked left arm.

2010 · 1 incident

September 9, 2010 AZ · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Gila River Sand & Gravel Corporation · Struck by... (Not Elsewhere Classified)

Employee was removing rail clamp inside of 8x20 Primary screen using a pry bar when bar slipped and struck employee on the right side of his face causing a laceration above his lip.

2008 · 2 incidents

December 19, 2008 AZ · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver HANDLING OF MATERIALS
Gila River Sand & Gravel Corporation · Over-exertion (Not Elsewhere Classified)

Employee claimed he hurt his wrist climbing down from truck on 12-19. He did not report until 12-22. Said he would be off 2 weeks. Our Dr. returned him to work to drive truck on 12-31. Investigation found employee had personal surgery and did not report to company. Under investigation due to holidays, will follow up and report to MSHA. Company at this time is denying accident.

May 2, 2008 AZ · Metal/Non-Metal front-end loader, scraper-loader operator, pan operator, payloader, scraper rig operator HANDLING OF MATERIALS
Gila River Sand & Gravel Corporation · Over-exertion in lifting objects

Employee was stockpiling sand with a 980 loader. He felt a pain his back. He reported to his supervisor but did not want medical help. On 5/12/08 he went to the hospital with back pains. He was placed off work. Our Insurance carrier investigated to make sure it was a work comp. case. GRSG had personal changes and overlooked the time to file.

2003 · 1 incident

September 30, 2003 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Gila River Sand & Gravel Corporation · Caught in, under or between a moving and a stationary object

EE WAS BEGINNING A WORK AREA EXAM WHEN HE WALKED UP TO THE REPAIR AREA, WHEN HE NOTICED MECHANICS HAVING TROUBLE W/GEAR BOX AS THEY WERE MANUALLY LIFTING & LINING GEAR BOX ONTO SHAFT, SO HE ST OOD BETWEEN CONVEYOR & BEHIND SERVICE TRUCK TO HELP LIFT THE 215 LBS GEAR BOX. IN MIDST OF LINING UP KEY WAY ON SHAFT FOR GEAR BOX TO SLIDE ONTO, GEAR BOX BEGAN SLIPPING OFF SHAFT & WHILE STI

1985 · 1 incident

April 24, 1985 AZ · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator ELECTRICAL
Tanner Companies · Flash burns (electric)

CLMT WAS CHECKING ELECTRICAL PANEL IN CRUSHER VAN WHILE DISCONNECTING WIRES THEY ARCHED IN HIS FACE