1024 San Tan Valley has $1K 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
4
Years on record
2025–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2024
6
citations
2
significant & substantial
$1,346
proposed penalties
$1,346
paid to date
100% of proposed penalties paid to date, a $0 gap.
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: 43 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
1024 San Tan Valley has $1K 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.
$1K
proposed penalties
$1K
current assessed
$1K
paid to date
$0
outstanding
6 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-23.
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: 2024-09-18
0%
of limit-tested samples over the exposure limit
2
samples
2
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz2
Show the individual readings (2)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-09-18
Quartz, respirable, >1% Qtz
0.41
0.59
0.69
Crusher Oper/Worker
2024-09-18
Quartz, respirable, >1% Qtz
0.4
1.15
0.35
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.
1024 San Tan Valley recorded 10.42 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.
10.42
total case rate
10.42
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.
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
2025 *
10.42
10.42
0.000
2024 *
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
16
2025
15
2024
14
Source: MSHA quarterly employment and production, updated weekly.
1024 San Tan Valley 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
9,821
0
0
0.0
2026 Q1
9,741
0
0
0.0
2025 Q4
7,901
3
2
379.7
2025 Q3
11,024
0
0
0.0
2025 Q2
10,381
0
0
0.0
2025 Q1
9,084
2
0
220.2
2024 Q4
9,173
0
0
0.0
2024 Q3
9,924
1
0
100.8
Show 2 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
8,200
0
0
0.0
2024 Q1
2,812
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
4 on file
2026 · 1 incident
June 16, 2026AZ · Metal/Non-Metaldry screening plant operator, screen house operatorHANDTOOLS (NONPOWERED)
The employee was descending the ladder from the top deck of the cone when a hand slipped approximately midway down, causing them to fall to the deck below. Reported to management 10/30 when diagnosed with a hernia.
August 4, 2025AZ · Metal/Non-Metalmaintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service techHANDLING OF MATERIALS
The employee had removed the pin on the tooth and was tapping it with a small sledgehammer on top to dislodge it from the shank. In the process of striking the tooth, a fragment of metal splintered off the tooth, striking the employee in the thigh.
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