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Rich Pit: 21 MSHA citations Metal/Non-Metal

Pueblo, Pueblo County, CO  ·  Active
MSHA Mine ID: 0504186

Rich Pit has $4K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
2
Years on record
1997–2024
Latest incident
Nov 2024
Compliance record
MSHA citations since 2022
21
citations
5
significant & substantial
$3,941
proposed penalties
$3,941
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
See Martin Marietta Materials Inc.'s full MSHA compliance history →
Inspection activity
MSHA inspections since 2021
14
inspections on record
229
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: 229 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Rich Pit has $4K in proposed MSHA penalties and $0 outstanding across 0 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.
$4K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
21 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-09.
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.
23.8%
significant & substantial
14.3%
high negligence or reckless
23.8%
reasonably likely or greater
52.4%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 0.0% low, 85.7% moderate, 14.3% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, 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: 2026-05-05
13%
of limit-tested samples over the exposure limit
12
samples
8
limit-tested
Most sampled contaminants
  • Quartz, respirable, >1% Qtz101 over
  • Respirable dust, <.1mg2
Show the individual readings (12)
Date Contaminant Concentration Limit Conc / limit Occupation
2022-04-20 Quartz, respirable, >1% Qtz 0.91 0.66 1.38 Laborer, Bullgang
2026-05-05 Quartz, respirable, >1% Qtz 0.16 0.58 0.28 Front-end Loader Operator
2026-05-05 Quartz, respirable, >1% Qtz 0.14 0.56 0.25 Laborer, Bullgang
2026-05-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2026-05-05 Respirable dust, <.1mg 0 Front-end Loader Operator
2023-10-04 Quartz, respirable, >1% Qtz 0.4 0.92 0.43 Crusher Oper/Worker
2023-10-04 Quartz, respirable, >1% Qtz 0.16 0.67 0.24 Crusher Oper/Worker
2023-10-04 Quartz, respirable, >1% Qtz 0.25 0.78 0.32 Laborer, Bullgang
2022-05-16 Quartz, respirable, >1% Qtz 0.32 0.74 0.43 Laborer, Bullgang
2022-04-20 Quartz, respirable, >1% Qtz 0.14 Bulldozer Operator
2022-04-20 Quartz, respirable, >1% Qtz 0.26 0.68 0.38 Truck Driver
2022-04-20 Quartz, respirable, >1% Qtz 0.17 Crusher Oper/Worker
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.
Ownership history
  1. Southwest Ready-Mix Inc 1986 to 1998
  2. Western Mobile Southern Inc 1998 to 1998
  3. Western Mobile Southern Inc 1998 to 2020
  4. Martin Marietta Materials Inc. 2020 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 9
2025 6
2024 6
2023 7
2022 7
2021 6
2020 5
2000 0
Source: MSHA quarterly employment and production, updated weekly.

Rich Pit sits in Pueblo County, Colorado, where the Census mining category is 0.2% 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.
Pueblo County, Colorado · Population 168,726
0.2%
Mining share of county employment
$62,250
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 6,258 0 0 0.0
2026 Q1 5,647 0 0 0.0
2025 Q4 2,908 3 0 1031.6
2025 Q3 2,479 0 0 0.0
2025 Q2 3,596 0 0 0.0
2025 Q1 3,686 0 0 0.0
2024 Q4 3,961 0 0 0.0
2024 Q3 3,241 0 0 0.0
Show 17 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2024 Q2 3,698 1 0 270.4
2024 Q1 2,719 1 0 367.8
2023 Q4 3,620 1 0 276.2
2023 Q3 4,064 0 0 0.0
2023 Q2 4,462 3 2 672.3
2023 Q1 4,282 0 0 0.0
2022 Q4 4,332 2 0 461.7
2022 Q3 4,850 0 0 0.0
2022 Q2 4,618 4 1 866.2
2022 Q1 3,471 0 0 0.0
2021 Q4 4,731 0 0 0.0
2021 Q3 4,061 0 0 0.0
2021 Q2 3,720 0 0 0.0
2021 Q1 261 0 0 0.0
2020 Q4 1,531 0 0 0.0
2000 Q2 0 0 0
2000 Q1 0 0 0
No fatalities recorded at this mine.

Reportable incidents

2 on file

2024 · 1 incident

November 6, 2024 CO · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer HANDLING OF MATERIALS
Martin Marietta Materials Inc. · Struck by falling object

EE pulled a locker on top of themselves while attempting to retrieve gloves.

1997 · 1 incident

February 24, 1997 CO · Metal/Non-Metal mine manager, mine foreman, mine owner MACHINERY
Southwest Ready-Mix Inc · Struck by... (Not Elsewhere Classified)

EE WAS PRIMING THE PUMP FOR THE WASH PLANT PRIOR TO STARTUP. AS HE WAS PUTTING THE CAP BACK ON, HE HAD ANOTHER EE START THE PUMP AND THE CAP BLEW OFF AND HIT HIM IN THE FACE.