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Rio Medina Metal/Non-Metal

San Antonio, Medina County, TX  ·  Active
MSHA Mine ID: 4103594

Rio Medina has $51K in proposed MSHA penalties and $0 outstanding across 5 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
7
Years on record
1992–2024
Latest incident
Apr 2024
Compliance record
MSHA citations since 2000
159
citations
38
significant & substantial
$50,721
proposed penalties
$50,350
paid to date
99% of proposed penalties paid to date, a $371 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
67
inspections on record
869
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: 869 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Rio Medina has $51K in proposed MSHA penalties and $0 outstanding across 5 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
155 assessments are final orders; 5 contested dockets.
As of the most recent assessment on 2025-10-30.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also the operator's enforcement record
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
2025 Q4 9,867 5 0 506.7
2025 Q3 9,992 0 0 0.0
2025 Q2 12,920 0 0 0.0
2025 Q1 11,238 0 0 0.0
2024 Q4 11,278 3 0 266.0
2024 Q3 11,193 1 0 89.3
2024 Q2 13,482 0 0 0.0
2024 Q1 13,131 0 0 0.0
Show 94 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 14,993 0 0 0.0
2023 Q3 16,840 5 2 296.9
2023 Q2 16,122 0 0 0.0
2023 Q1 15,956 0 0 0.0
2022 Q4 14,945 0 0 0.0
2022 Q3 15,975 10 3 626.0
2022 Q2 15,052 0 0 0.0
2022 Q1 14,957 0 0 0.0
2021 Q4 16,511 0 0 0.0
2021 Q3 15,726 1 0 63.6
2021 Q2 12,892 0 0 0.0
2021 Q1 11,507 1 1 86.9
2020 Q4 14,091 0 0 0.0
2020 Q3 13,088 0 0 0.0
2020 Q2 13,822 1 0 72.3
2020 Q1 16,051 0 0 0.0
2019 Q4 15,973 1 0 62.6
2019 Q3 15,334 1 0 65.2
2019 Q2 13,703 0 0 0.0
2019 Q1 14,567 1 0 68.6
2018 Q4 14,700 0 0 0.0
2018 Q3 14,157 0 0 0.0
2018 Q2 14,753 4 1 271.1
2018 Q1 14,724 1 0 67.9
2017 Q4 14,820 0 0 0.0
2017 Q3 16,901 0 0 0.0
2017 Q2 15,984 3 0 187.7
2017 Q1 15,919 0 0 0.0
2016 Q4 17,352 0 0 0.0
2016 Q3 17,961 0 0 0.0
2016 Q2 17,003 2 0 117.6
2016 Q1 14,590 0 0 0.0
2015 Q4 18,373 1 0 54.4
2015 Q3 17,008 0 0 0.0
2015 Q2 17,323 3 1 173.2
2015 Q1 16,094 0 0 0.0
2014 Q4 14,705 2 2 136.0
2014 Q3 14,915 5 1 335.2
2014 Q2 15,731 0 0 0.0
2014 Q1 12,876 2 0 155.3
2013 Q4 15,083 0 0 0.0
2013 Q3 15,077 0 0 0.0
2013 Q2 12,888 1 0 77.6
2013 Q1 12,661 0 0 0.0
2012 Q4 13,191 5 1 379.0
2012 Q3 14,332 0 0 0.0
2012 Q2 6,252 3 0 479.8
2012 Q1 5,238 0 0 0.0
2011 Q4 4,616 0 0 0.0
2011 Q3 2,583 0 0 0.0
2011 Q2 9 0 0 0.0
2011 Q1 16,005 3 0 187.4
2010 Q4 16,890 0 0 0.0
2010 Q3 15,911 0 0 0.0
2010 Q2 14,577 4 2 274.4
2010 Q1 13,754 7 2 508.9
2009 Q4 18,964 0 0 0.0
2009 Q3 18,305 0 0 0.0
2009 Q2 19,452 6 4 308.5
2009 Q1 15,471 10 2 646.4
2008 Q4 21,107 0 0 0.0
2008 Q3 20,537 0 0 0.0
2008 Q2 23,489 13 3 553.5
2008 Q1 21,881 4 1 182.8
2007 Q4 22,283 0 0 0.0
2007 Q3 20,773 0 0 0.0
2007 Q2 18,017 7 0 388.5
2007 Q1 27,484 0 0 0.0
2006 Q4 19,851 0 0 0.0
2006 Q3 19,317 5 0 258.8
2006 Q2 16,796 0 0 0.0
2006 Q1 16,940 5 1 295.2
2005 Q4 15,657 0 0 0.0
2005 Q3 15,712 0 0 0.0
2005 Q2 14,661 2 0 136.4
2005 Q1 13,201 0 0 0.0
2004 Q4 15,573 0 0 0.0
2004 Q3 13,522 0 0 0.0
2004 Q2 15,016 1 1 66.6
2004 Q1 10,784 4 2 370.9
2003 Q4 15,025 6 4 399.3
2003 Q3 11,809 0 0 0.0
2003 Q2 10,825 0 0 0.0
2003 Q1 9,609 0 0 0.0
2002 Q4 9,256 0 0 0.0
2002 Q3 9,937 1 0 100.6
2002 Q2 10,821 0 0 0.0
2002 Q1 9,946 2 1 201.1
2001 Q4 10,977 0 0 0.0
2001 Q3 10,049 2 0 199.0
2001 Q2 8,009 12 1 1498.3
2001 Q1 7,109 0 0 0.0
2000 Q3 8,860 0 0 0.0
2000 Q1 10,104 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

7 on file

2024 · 1 incident

April 12, 2024 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Martin Marietta Materials Southwest LLC · Caught in, under or between a moving and a stationary object

EE was moving a large rock, rock slipped, EE moved to grab it and EE's thumb was smashed between the rock and loader frame. EE received a fracture to tip of right thumb and received 7 stitches.

2023 · 2 incidents

July 10, 2023 TX · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDLING OF MATERIALS
Martin Marietta Materials Southwest LLC · Over-exertion in lifting objects

EE was moving rock from choked crusher. Rock was in front of EE and EE tried to adjust it. EE heard shoulder pop and then felt intense pain.

February 9, 2023 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech MACHINERY
Martin Marietta Materials Southwest LLC · Struck by... (Not Elsewhere Classified)

EE was holding counter sunk bolt up in position while using impact to loosen nut, impact caused bolt to turn cutting palm of EE left hand.

2022 · 1 incident

2019 · 1 incident

October 11, 2019 TX · Metal/Non-Metal miner, prospector, nec HANDLING OF MATERIALS
Martin Marietta Materials Southwest LLC · Caught in, under or between a moving and a stationary object

EE1 opened clogged crusher, entered and began removing larger rocks through the crusher door. EE2 was on the platform outside moving rocks from the door over the edge of the platform to the ground. A rock shifted and pinched EE2 finger against the steel crusher door.

2005 · 1 incident

November 10, 2005 TX · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDTOOLS (NONPOWERED)
Medina Crushed Stone Inc. · Struck by... (Not Elsewhere Classified)

Employee was holding a hammer pin when another employee was driving the pin in with a sledge hammer. The co-worker missed the pin and struck injured on the hand with hammer.

1992 · 1 incident

September 22, 1992 TX · Metal/Non-Metal mine manager, mine foreman, mine owner EXPLOSIVES AND BREAKING AGENTS
Medina Crushed Stone Inc. · Struck by falling object

I WAS SEEKING PROTECTION FROM THE FLY ROCKS BEHIND A ROCK LEDGE,I SET OFF THE BLAST THE VIBRATION CRACKED THE LEDGE ABOVE ME AND A PIECE OF THE LEDGE FELL,FROM ABOUT A FOOT ABOVE AND FELL ON T HE LEFT SIDE OF MY BACK AND SLID OFF GRAISING MYBACK.INJURIES RECEIVED FRACTURED PELVIS,4 FRACTURED RIBS,TORN BLADDER.THERE IS NOT PERMANENT INJURY OR DISABILITIES.

For insurers, brokers, and safety consultants

The full compliance file on Rio Medina

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.

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