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MIMBRES PIT: 224 MSHA citations Metal/Non-Metal

Controlled by Charles Hamilton
Silver City, Luna County, NM  ·  Active
MSHA Mine ID: 2900473

MIMBRES PIT has $51K in proposed MSHA penalties and $0 outstanding across 6 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
15
Years on record
1984–2022
Latest incident
Dec 2022
Compliance record
MSHA citations since 2000
224
citations
64
significant & substantial
$51,168
proposed penalties
$50,293
paid to date
98% of proposed penalties paid to date, a $875 gap.
Source: MSHA violations data, updated weekly.
See Southwest Concrete & Paving Inc's full MSHA compliance history →
Inspection activity
MSHA inspections since 2000
79
inspections on record
1,349
inspection hours
16.6
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.
224 citations across 1,349 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: 2023-07-11.
On record since 2015.
Source: MSHA imminent-danger order records, updated weekly.

MIMBRES PIT has $51K in proposed MSHA penalties and $0 outstanding across 6 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.
$51K
proposed penalties
$50K
current assessed
$50K
paid to date
$0
outstanding
222 assessments are final orders; 6 contested dockets.
Of $4K in penalties contested before the Commission, $2K was upheld in final decisions.
As of the most recent assessment on 2026-05-20.
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.
28.8%
significant & substantial
3.2%
high negligence or reckless
30.2%
reasonably likely or greater
52.7%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 12.2% low, 84.7% moderate, 3.2% 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.
22 citations taken to the federal commission · 10% of citations on record
  • Settled 21 · 95%
  • Vacated or withdrawn 1 · 5%
72%
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 18 decided S&S contests · industry: 79%
43%
Penalty reduction in decided contests
$4K proposed, $2K 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 2012-09-24.
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
CENT 2007-270M Settlement Zielinski 2008 $1K → $700
CENT20030207M Settlement Zielinski 2005 $865 → $629
CENT 2012-920M Withdrawal Zielinski 2013 $687 → $0
CENT 2007-298M Settlement Zielinski 2008 $660 → $467
CENT 2004-192M Settlement Zielinski 2005 $346 → $228
CENT 2004-87-M Settlement Zielinski 2005 $55 → $55
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: 2025-07-30
0%
of limit-tested samples over the exposure limit
36
samples
16
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz19
  • Respirable dust, <.1mg16
  • Nuisance dust, respirable, <1% Qtz1
Show the individual readings (36)
Date Contaminant Concentration Limit Conc / limit Occupation
2025-07-30 Respirable dust, <.1mg 0 Laborer, Bullgang
2025-07-30 Respirable dust, <.1mg 0 Laborer, Bullgang
2025-07-30 Respirable dust, <.1mg 0 Laborer, Bullgang
2021-02-25 Respirable dust, <.1mg 0 Complete Load-Haul-Dump
2021-02-25 Quartz, respirable, >1% Qtz 0.13 Complete Load-Haul-Dump
2021-02-25 Quartz, respirable, >1% Qtz 0.21 Backhoe Operator
2021-02-25 Nuisance dust, respirable, <1% Qtz 0.29 10 0.03 Front-end Loader Operator
2021-02-25 Respirable dust, <.1mg 0 Front-end Loader Operator
2020-01-23 Quartz, respirable, >1% Qtz 0.15 Laborer, Bullgang
2020-01-23 Quartz, respirable, >1% Qtz 1 Crusher Oper/Worker
2017-04-18 Quartz, respirable, >1% Qtz 0.4 1.39 0.29 Mechanic
2017-04-18 Respirable dust, <.1mg 0 Mechanic
2017-04-18 Respirable dust, <.1mg 0 Front-end Loader Operator
2016-07-27 Quartz, respirable, >1% Qtz 0.33 1.66 0.20 Laborer, Bullgang
2016-07-27 Quartz, respirable, >1% Qtz 0.22 1.15 0.19 Laborer, Bullgang
2016-07-27 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-01-07 Respirable dust, <.1mg 0 Front-end Loader Operator
2015-01-07 Quartz, respirable, >1% Qtz 0.24 1.53 0.16 Laborer, Bullgang
2015-01-07 Quartz, respirable, >1% Qtz 0.22 1.72 0.13 Laborer, Bullgang
2015-01-07 Respirable dust, <.1mg 0 Crusher Oper/Worker
2010-06-09 Respirable dust, <.1mg 0 Crusher Oper/Worker
2010-06-09 Quartz, respirable, >1% Qtz 0.24 1.43 0.17 Cleanup Man
2010-06-09 Respirable dust, <.1mg 0 Front-end Loader Operator
2009-01-07 Quartz, respirable, >1% Qtz 0.18 1.38 0.13 Laborer, Bullgang
2009-01-07 Quartz, respirable, >1% Qtz 0.21 0.72 0.29 Laborer, Bullgang
2008-02-06 Quartz, respirable, >1% Qtz 0.19 1.72 0.11 Laborer, Bullgang
2008-02-06 Respirable dust, <.1mg 0 Truck Driver
2008-02-06 Quartz, respirable, >1% Qtz 0.12 1.11 0.11 Laborer, Bullgang
2006-06-28 Respirable dust, <.1mg 0 Front-end Loader Operator
2006-06-28 Quartz, respirable, >1% Qtz 0.18 1.05 0.17 Crusher Oper/Worker
2006-06-28 Respirable dust, <.1mg 0 Cleanup Man
2001-06-07 Quartz, respirable, >1% Qtz 0.13 0.98 0.13 Front-end Loader Operator
2001-06-07 Quartz, respirable, >1% Qtz 0.49 1.18 0.42 Supervisor, Co. Official
2001-06-07 Quartz, respirable, >1% Qtz 0.22 1.1 0.20 Truck Driver
2001-06-07 Quartz, respirable, >1% Qtz 0.48 1.03 0.47 Dry Screen Plant Operator
2001-06-07 Respirable dust, <.1mg 0 Front-end Loader 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.

MIMBRES PIT recorded 0.00 reportable injury cases per 100 full-time workers in 2024.

Injury rate, 2024
ⓘ 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 1.77 and the all-US-mining average was 2.08 cases per 100 workers.
In New Mexico, metal and nonmetal mining averaged 1.66 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
2024 * 0.00 0.00 0.000
2021 * 0.00 0.00 0.000
2020 * 0.00 0.00 0.000
2019 * 0.00 0.00 0.000
2018 * 7.76 0.00 0.000
2016 * 0.00 0.00 0.000
2015 * 24.86 24.86 0.000
2013 * 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.
Ownership history
  1. Southwest Sand & Gravel Inc 1950 to 1994
  2. Southwest Concrete & Paving Inc 1994 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 12
2025 12
2024 14
2023 13
2022 12
2021 14
2020 11
2019 16
2018 14
2017 11
2016 14
2015 16
2014 10
2013 11
2012 12
2011 15
2010 12
2009 14
2008 16
2007 15
2006 16
2005 23
2004 18
2003 10
2002 13
2001 10
2000 9
Source: MSHA quarterly employment and production, updated weekly.

MIMBRES PIT sits in Luna County, New Mexico, where the Census mining category is 5.4% 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.
Luna County, New Mexico · Population 25,420
5.4%
Mining share of county employment
$37,917
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 6,037 4 0 662.6
2026 Q1 6,489 0 0 0.0
2025 Q4 5,199 4 0 769.4
2025 Q3 5,385 7 1 1299.9
2025 Q2 4,571 0 0 0.0
2025 Q1 4,083 10 1 2449.2
2024 Q4 3,051 0 0 0.0
2024 Q3 5,087 0 0 0.0
Show 98 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 6,485 3 1 462.6
2024 Q1 5,532 0 0 0.0
2023 Q4 5,716 4 1 699.8
2023 Q3 6,138 4 1 651.7
2023 Q2 5,043 0 0 0.0
2023 Q1 2,654 0 0 0.0
2022 Q4 2,879 2 0 694.7
2022 Q3 4,039 0 0 0.0
2022 Q2 4,443 4 1 900.3
2022 Q1 5,360 0 0 0.0
2021 Q4 3,914 3 0 766.5
2021 Q3 6,055 1 0 165.2
2021 Q2 7,571 0 0 0.0
2021 Q1 6,893 2 0 290.1
2020 Q4 8,477 0 0 0.0
2020 Q3 5,884 0 0 0.0
2020 Q2 5,347 2 1 374.0
2020 Q1 5,446 4 0 734.5
2019 Q4 6,126 0 0 0.0
2019 Q3 7,722 0 0 0.0
2019 Q2 6,439 5 1 776.5
2019 Q1 8,608 4 0 464.7
2018 Q4 8,407 0 0 0.0
2018 Q3 8,687 0 0 0.0
2018 Q2 5,380 2 0 371.7
2018 Q1 3,302 0 0 0.0
2017 Q4 3,957 1 0 252.7
2017 Q3 4,198 0 0 0.0
2017 Q2 4,789 7 1 1461.7
2017 Q1 6,780 0 0 0.0
2016 Q4 8,486 4 1 471.4
2016 Q3 7,257 4 2 551.2
2016 Q2 4,718 0 0 0.0
2016 Q1 3,949 0 0 0.0
2015 Q4 4,799 12 4 2500.5
2015 Q3 7,277 0 0 0.0
2015 Q2 6,939 1 0 144.1
2015 Q1 5,116 3 1 586.4
2014 Q4 4,807 0 0 0.0
2014 Q3 3,837 2 0 521.2
2014 Q2 4,515 0 0 0.0
2014 Q1 4,894 2 0 408.7
2013 Q4 6,846 0 0 0.0
2013 Q3 4,708 0 0 0.0
2013 Q2 4,514 1 0 221.5
2013 Q1 4,808 3 0 624.0
2012 Q4 5,746 0 0 0.0
2012 Q3 4,633 8 4 1726.7
2012 Q2 5,974 0 0 0.0
2012 Q1 5,325 4 1 751.2
2011 Q4 6,000 0 0 0.0
2011 Q3 8,033 0 0 0.0
2011 Q2 8,033 4 0 497.9
2011 Q1 5,508 9 4 1634.0
2010 Q4 5,590 0 0 0.0
2010 Q3 4,617 0 0 0.0
2010 Q2 4,785 2 0 418.0
2010 Q1 4,084 0 0 0.0
2009 Q4 4,022 4 0 994.5
2009 Q3 4,686 0 0 0.0
2009 Q2 6,396 2 0 312.7
2009 Q1 6,605 5 2 757.0
2008 Q4 6,881 0 0 0.0
2008 Q3 5,680 0 0 0.0
2008 Q2 6,243 7 2 1121.3
2008 Q1 6,745 6 3 889.5
2007 Q4 7,322 0 0 0.0
2007 Q3 8,422 19 9 2256.0
2007 Q2 6,852 14 9 2043.2
2007 Q1 6,021 0 0 0.0
2006 Q4 5,154 0 0 0.0
2006 Q3 6,925 0 0 0.0
2006 Q2 6,451 4 3 620.1
2006 Q1 5,643 0 0 0.0
2005 Q4 4,424 1 0 226.0
2005 Q3 5,282 0 0 0.0
2005 Q2 4,962 0 0 0.0
2005 Q1 4,459 0 0 0.0
2004 Q4 3,101 0 0 0.0
2004 Q3 3,251 0 0 0.0
2004 Q2 3,315 0 0 0.0
2004 Q1 3,600 2 0 555.6
2003 Q4 3,115 0 0 0.0
2003 Q3 3,874 1 0 258.1
2003 Q2 4,250 0 0 0.0
2003 Q1 4,380 0 0 0.0
2002 Q4 5,503 9 5 1635.5
2002 Q3 6,381 0 0 0.0
2002 Q2 4,607 0 0 0.0
2002 Q1 4,734 0 0 0.0
2001 Q4 4,397 0 0 0.0
2001 Q3 3,170 0 0 0.0
2001 Q2 3,419 3 2 877.4
2001 Q1 2,947 5 2 1696.6
2000 Q4 2,736 0 0 0.0
2000 Q3 2,452 9 1 3670.5
2000 Q2 3,686 0 0 0.0
2000 Q1 3,035 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

15 on file

2022 · 1 incident

December 15, 2022 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Southwest Concrete & Paving Inc · Struck by... (Not Elsewhere Classified)

Employee was cutting a belt with a utility knife, and it slipped cutting EE's arm just above the wrist.

2018 · 1 incident

October 17, 2018 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Southwest Concrete & Paving Inc · Struck against stationary object

Employee was shoveling out the tail pulley on the under jaw conveyor. When EE was trying to push material out from under the conveyor it caught the shovel therefore twisting the shovel out from EE's hand causing it to rip off half of the left hand index finger nail.

2017 · 1 incident

March 1, 2017 NM · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Southwest Concrete & Paving Inc · Over-exertion in lifting objects

Installing a tail pulley on fines stacker conveyor. Lifted pulley in an awkward position, felt the strain.

2015 · 3 incidents

September 2, 2015 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDTOOLS (NONPOWERED)
Southwest Concrete & Paving Inc · Caught in, under or between (Not Elsewhere Classified)

Employee was changing the tail pulley bearings on the sand conveyor tail pulley when the cable come along broke lifting the belt roll forward pinching his right hand.

June 19, 2015 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Southwest Concrete & Paving Inc · Over-exertion (Not Elsewhere Classified)

Welder was welding on the crusher in a squatted position. Other potential contributing factors may be heat and lack of hydration. Welder strained his lower back.

January 21, 2015 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman POWERED HAULAGE
Southwest Concrete & Paving Inc · Struck by falling object

EE was cleaning up material by jaw crusher with skid steer loader. He raised bucket to dump material when a rock rolled off the backside of bucket falling into the cab and hitting ee left foot.

2014 · 1 incident

January 23, 2014 NM · Metal/Non-Metal greaser, grease man, oiler, lube man, dragline oiler SLIP OR FALL OF PERSON
Southwest Concrete & Paving Inc · Fall from machine

As per employee: At 9:30 AM, I employee decided to climb the Ortner to clean it. Then the alarm went off and I jumped off, landed on my left foot and the ground was frozen, and I know I should have not been there, but I wanted to clean it out.

2010 · 1 incident

October 23, 2010 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman SLIP OR FALL OF PERSON
Southwest Concrete & Paving Inc · Fall onto or against objects

EE was stepping up into a belt to work on it when he lost his footing. He used his right hand to catch his fall when he smashed his right middle finger onto a rock. The rock caused a small laceration to the finger.

1995 · 3 incidents

December 30, 1995 NM · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Southwest Concrete & Paving Inc · Struck by... (Not Elsewhere Classified)

EE WAS WORKING ON A DIESEL ENGINE INSTALLING AN INJECTOR PUMP ON A POWER SCREENING PLANT. HE HADREMOVED THE RADIATOR FAN SHROUD, WAS PRIMING & TESTING ENGINE, HAS #1 INJECTOR LOOSE, ENGINE STA RTED & HE WENT TO TIGHTEN UP #1 INJECTOR, & STUCK RIGHT HAND INTO FAN BLADE! RECIEVED SEVER LACERATIONS ON R HAND & WRIST. NO PROPERTY DAMAGE.

June 27, 1995 NM · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
Southwest Concrete & Paving Inc · Struck by flying object

WAS CHANGING OUT A HEAD PULLEY BEARING ON #1 FEED APRON REPLACING THE BEARIN. WE WERE DRIVING IT BACK ON WITH A HAMMER WHEN IT SHATTERED & A PIECE OF IT HIT ME IN THE CHEST.

March 22, 1995 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman MACHINERY
Southwest Concrete & Paving Inc · Contact with hot objects or substances

EMPLOYEE WAS CUTTING BEARINGS OUT OF #2 SCREEN WHEN HOT SLAG FELL DOWN HIS GLOVE AND BURNED HIS INDEX FINGER. MINISTERED FIRST AID AND WENT BACKTO WORK.

1994 · 1 incident

1992 · 1 incident

April 28, 1992 NM · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
Southwest Sand & Gravel Inc · Struck against a moving object

MODEL TEREX TRUCK. SEVERAL CONDITIONS CAUSED TRUCK TO ROLL OVER. REAR FRAME ONLY. SPEED ROAD CONDITIONS AND LOADSHIFT ALL CONTRIBUTED TO ROLLOVER.

1989 · 1 incident

January 18, 1989 NM · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman HANDLING OF MATERIALS
Southwest Sand & Gravel Inc · Over-exertion (Not Elsewhere Classified)

I.NAME AND ANOTHER MAN IN PROCESS OF STANDING FULL 55 GALLON DRUM ON END EMPLOYEE FELT PAIN IN LOWER BACK

1984 · 1 incident

March 6, 1984 NM · Metal/Non-Metal superintendent HANDTOOLS (NONPOWERED)
Southwest Sand & Gravel Inc · Struck by falling object

ASSISTING IN PUTTING THE SAFETY GUARD BACK ON CRUSHER WHEN THE BOLT SECURING HOISTING CHAIN ON ONE END BROKE, LETTING THE GUARD FALL & HIT THE INJURED IN THE FOREHEAD.