Portable Sand Plant #4: 13 MSHA citations Metal/Non-Metal
Portable Sand Plant #4 has no reportable incidents on file with MSHA. MSHA has proposed $2K in penalties since 2016.
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- Fatalities
- 0
- Total incidents
- 0
- Years on record
- —
- Latest incident
- —
Compliance record
MSHA citations since 2016
13
citations
2
significant & substantial
$1,690
proposed penalties
$1,690
paid to date
100% of proposed penalties paid to date. The remaining $0 was reduced, settled, contested or is still owed.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2016
16
inspections on record
63
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: 63 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Portable Sand Plant #4 has $2K 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.$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
11 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-01.
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.15.4%
significant & substantial
23.1%
high negligence or reckless
15.4%
reasonably likely or greater
30.8%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 15.4% low, 61.5% moderate, 23.1% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
Ownership history
- Tiefenthaler Ag-Lime, Inc 2015 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 2 |
| 2025 | 2 |
| 2024 | 2 |
| 2022 | 2 |
| 2021 | 2 |
| 2020 | 2 |
| 2019 | 2 |
| 2018 | 2 |
| 2017 | 2 |
| 2016 | 2 |
| 2015 | 2 |
Source: MSHA quarterly employment and production, updated weekly; years before 2000 come from MSHA's archived Part 50 employment files.
Portable Sand Plant #4 sits in Carroll County, Iowa, where the Census mining category is 0.0% 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.Carroll County, Iowa · Population 20,677
0.0%
Mining share of county employment
$68,528
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; earlier incidents are counted but not rate-adjusted, though reported hours reach back to 1983. 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 | 85 | 0 | 0 | 0.0 |
| 2026 Q1 | 120 | 0 | 0 | 0.0 |
| 2025 Q4 | 72 | 1 | 0 | 13888.9 |
| 2025 Q3 | 80 | 0 | 0 | 0.0 |
| 2025 Q2 | 187 | 4 | 1 | 21390.4 |
| 2025 Q1 | 233 | 0 | 0 | 0.0 |
| 2024 Q4 | 218 | 0 | 0 | 0.0 |
| 2024 Q3 | 223 | 0 | 0 | 0.0 |
Show 32 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 165 | 1 | 0 | 6060.6 |
| 2022 Q4 | 50 | 0 | 0 | 0.0 |
| 2022 Q3 | 40 | 1 | 0 | 25000.0 |
| 2022 Q2 | 35 | 0 | 0 | 0.0 |
| 2022 Q1 | 2 | 0 | 0 | 0.0 |
| 2021 Q4 | 6 | 0 | 0 | 0.0 |
| 2021 Q3 | 30 | 1 | 0 | 33333.3 |
| 2021 Q2 | 26 | 0 | 0 | 0.0 |
| 2021 Q1 | 2 | 0 | 0 | 0.0 |
| 2020 Q4 | 11 | 0 | 0 | 0.0 |
| 2020 Q3 | 31 | 1 | 0 | 32258.1 |
| 2020 Q2 | 84 | 0 | 0 | 0.0 |
| 2020 Q1 | 2 | 0 | 0 | 0.0 |
| 2019 Q4 | 28 | 0 | 0 | 0.0 |
| 2019 Q3 | 45 | 0 | 0 | 0.0 |
| 2019 Q2 | 53 | 0 | 0 | 0.0 |
| 2019 Q1 | 5 | 0 | 0 | 0.0 |
| 2018 Q4 | 34 | 0 | 0 | 0.0 |
| 2018 Q3 | 40 | 0 | 0 | 0.0 |
| 2018 Q2 | 69 | 0 | 0 | 0.0 |
| 2018 Q1 | 4 | 0 | 0 | 0.0 |
| 2017 Q4 | 38 | 0 | 0 | 0.0 |
| 2017 Q3 | 43 | 0 | 0 | 0.0 |
| 2017 Q2 | 27 | 0 | 0 | 0.0 |
| 2017 Q1 | 4 | 0 | 0 | 0.0 |
| 2016 Q4 | 5 | 0 | 0 | 0.0 |
| 2016 Q3 | 94 | 2 | 1 | 21276.6 |
| 2016 Q2 | 4 | 0 | 0 | 0.0 |
| 2016 Q1 | 5 | 0 | 0 | 0.0 |
| 2015 Q4 | 28 | 0 | 0 | 0.0 |
| 2015 Q3 | 98 | 0 | 0 | 0.0 |
| 2015 Q2 | 100 | 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.