Heartland Aggregate Mining has $14K 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
1
Years on record
2018
Latest incident
Jul 2018
Compliance record
MSHA citations since 2018
55
citations
10
significant & substantial
$13,873
proposed penalties
$13,873
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2018
22
inspections on record
309
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: 309 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Heartland Aggregate Mining has $14K 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.
$14K
proposed penalties
$14K
current assessed
$14K
paid to date
$0
outstanding
55 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-05-15.
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.
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: 2022-09-27, 3 years ago
0%
of limit-tested samples over the exposure limit
7
samples
3
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz5
Respirable dust, <.1mg2
Show the individual readings (7)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2022-09-27
Quartz, respirable, >1% Qtz
0.14
0.47
0.30
Front-end Loader Operator
2022-09-27
Respirable dust, <.1mg
0
Crusher Oper/Worker
2022-09-27
Respirable dust, <.1mg
0
Rotary Bucket Ex. Operator
2018-07-31
Quartz, respirable, >1% Qtz
0.42
Front-end Loader Operator
2018-07-31
Quartz, respirable, >1% Qtz
0.15
Front-end Loader Operator
2018-07-31
Quartz, respirable, >1% Qtz
0.23
0.63
0.37
Front-end Loader Operator
2018-07-31
Quartz, respirable, >1% Qtz
0.32
0.97
0.33
Truck Driver
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
5
2025
4
2024
8
2023
8
2022
9
2021
10
2020
11
2019
8
2018
11
Source: MSHA quarterly employment and production, updated weekly.
Heartland Aggregate Mining sits in Park County, Colorado, where the Census mining category is 0.7% 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.
Park County, Colorado · Population 17,739
0.7%
Mining share of county employment
$95,450
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
2,891
3
2
1037.7
2026 Q1
1,080
0
0
0.0
2025 Q4
1,410
2
0
1418.4
2025 Q3
3,235
4
2
1236.5
2025 Q2
1,395
0
0
0.0
2025 Q1
2,177
0
0
0.0
2024 Q4
2,945
2
0
679.1
2024 Q3
1,895
0
0
0.0
Show 26 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
4,095
0
0
0.0
2024 Q1
4,519
2
0
442.6
2023 Q4
2,105
1
0
475.1
2023 Q3
4,210
7
2
1662.7
2023 Q2
3,810
0
0
0.0
2023 Q1
2,455
0
0
0.0
2022 Q4
2,283
3
0
1314.1
2022 Q3
1,967
1
0
508.4
2022 Q2
3,247
0
0
0.0
2022 Q1
1,837
1
0
544.4
2021 Q4
2,562
0
0
0.0
2021 Q3
4,229
0
0
0.0
2021 Q2
6,619
8
1
1208.6
2021 Q1
2,372
0
0
0.0
2020 Q4
2,731
0
0
0.0
2020 Q3
3,895
0
0
0.0
2020 Q2
3,094
14
3
4524.9
2020 Q1
783
0
0
0.0
2019 Q4
2,459
0
0
0.0
2019 Q3
3,949
0
0
0.0
2019 Q2
2,729
2
0
732.9
2019 Q1
837
0
0
0.0
2018 Q4
1,911
0
0
0.0
2018 Q3
3,193
1
0
313.2
2018 Q2
2,503
0
0
0.0
2018 Q1
901
4
0
4439.5
No fatalities recorded at this mine.
Reportable incidents
1 on file
2018 · 1 incident
July 2, 2018CO · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerSLIP OR FALL OF PERSON