Portable Plant 1 Metal/Non-Metal
MSHA record for Portable Plant 1 (mine ID 4202775). Fatalities, non-fatal incidents grouped by year, current operator and controller, and mine context.
Watch this mine
Email me when a new MSHA incident is filed at Portable Plant 1.
- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Inspection activity
MSHA inspections since 2026
1
inspections on record
20
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: 20 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, 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: 2026-06-10
ⓘ
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.2
samples
0
limit-tested
Most sampled contaminants
- Respirable dust, <.1mg2
Show the individual readings (2)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2026-06-10 | Respirable dust, <.1mg | 0 | Front-end Loader Operator | ||
| 2026-06-10 | 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.
Ownership history
- Sonderegger Inc 2025 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 3 |
| 2025 | 2 |
Source: MSHA quarterly employment and production, updated weekly.
Portable Plant 1 sits in San Juan County, Utah, where the Census mining category is 4.9% 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.San Juan County, Utah · Population 14,466
4.9%
Mining share of county employment
$54,890
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 | 1,133 | 0 | 0 | 0.0 |
| 2026 Q1 | 588 | 0 | 0 | 0.0 |
| 2025 Q4 | 0 | 0 | 0 | |
| 2025 Q3 | 220 | 0 | 0 | 0.0 |
| 2025 Q2 | 591 | 0 | 0 | 0.0 |
| 2025 Q1 | 214 | 0 | 0 | 0.0 |
No reportable incidents on file.
MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.