On September 28, 2017, employee was helping in the roof bolting activities on the longwall face. During this activity, coal came from the longwall face fatally injuring the employee.
MidAmerican Energy Holdings Company; IDACORP: 5 recorded fatalities controller
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Email me when a new MSHA incident is filed at any mine MidAmerican Energy Holdings Company; IDACORP controls.
IDACORP INC (IDA) discloses mines under this controller in its SEC Dodd-Frank Section 1503 (EX-95) mine-safety filings.
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This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.ⓘ
A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.ⓘ
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.ⓘ
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.| Year | total case rate | days-away | fatal |
|---|---|---|---|
| 2026 | 0.97 | 0.97 | 0.000 |
| 2025 | 1.81 | 1.35 | 0.000 |
| 2024 | 0.00 | 0.00 | 0.000 |
| 2023 | 0.88 | 0.00 | 0.000 |
| 2022 | 1.45 | 0.00 | 0.000 |
| 2021 | 1.59 | 0.96 | 0.000 |
| 2020 | 2.13 | 0.53 | 0.000 |
| 2019 | 1.07 | 0.27 | 0.000 |
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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.Respirable coal dust
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Respirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.
Last sampled: 2026-08-06
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Respirable coal dust and silica figures cover coal facilities. Dust compliance is measured against the current 1.5 mg/m3 standard; samples predating the 2014 standard are included, so compliance rates are a coarse historical signal.ⓘ
The excessive concentration value (ECV) is MSHA's own per-sample enforcement threshold, which builds in measurement uncertainty; a sample over its ECV can trigger a citation. The count covers only samples MSHA assigned an ECV.- CONTINUOUS MINER OPERATOR1,221
- LONGWALL OPERATOR (TAILGATE SIDE)622
- ROOF BOLTER (TWIN HEAD) (RETURN SIDE)405
Silica (quartz)
Last sampled: 2026-03-18- CONTINUOUS MINER OPERATOR66
- LONGWALL OPERATOR (TAILGATE SIDE)45
- ROOF BOLTER (TWIN HEAD) (RETURN SIDE)31
Noise
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The share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.
Last sampled: 2026-07-29
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The share counts noise samples whose measured dose exceeded the 90 dBA permissible exposure limit. It describes the sampled workplace, not what reached the miner's ear: hearing conservation programs and the hearing protection worn during the shift are recorded separately and are not reflected here.- MECHANIC70
- BULLDOZER OPERATOR57
- BELT MAN/CONVEYOR MAN45
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Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.- Settled 422 · 98%
- Stood as issued 7 · 2%
- Still open 3 · 1%
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Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.ⓘ
A reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.| Docket | Decision | Judge | Year | Proposed / upheld |
|---|---|---|---|---|
| WEST 2010-809 | Settlement | Miller | 2010 | $165K → $50K |
| WEST 2015-0915 | Settlement | Simonton | 2017 | $145K → $70K |
| WEST 2013-835 | Settlement | Manning | 2014 | $124K → $70K |
| WEST 2010-1567 | Settlement | Manning | 2011 | $83K → $26K |
| WEST 2009-110 | Settlement | Manning | 2013 | $82K → $51K |
| WEST 2015-0662 | Settlement | Simonton | 2015 | $70K → $6K |
Top causes
- MACHINERY 3 fatalities · 75 non-fatal
- SLIP OR FALL OF PERSON 1 fatality · 154 non-fatal
- FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL 1 fatality · 4 non-fatal
- HANDLING OF MATERIALS 231 non-fatal
- HANDTOOLS (NONPOWERED) 80 non-fatal
- POWERED HAULAGE 54 non-fatal
Incident timeline
Operators under this controller
Mines on record
Fatalities under this controller
5 recordedEmployee was building drill bench, pushed thru the berm at the edge of the highwall and traveled over the highwall.
While installing structural steel doors over coal bin EE went around safety rail without using fall protection on the door which was still attached to the crane to try to move the door & close a gap between the doors. The door shifted causing a support I-beam to move shifting the doors which caused him to fall. MSHA was notified 12/27/05 that he had expired from his injuries.
WHILE CHANGING A TRACK ON A DOZER, THE CHAIN HOOK SLIPPED OFF THE BOGIE & STRUCK THE EE IN THE HEAD AREA RESULTING INS SIGNIFICANT TRAUMA TO THEHEAD AREA. THE EE WAS TRASNPORTED TO THE UNIVERS ITY OF UTAH MED CTR. EE PASSED AWAY 9/25 AS A RESULT OF THE INJURIES SUSTAINED IN THIS ACCIDENT.
A TEMPORARY SUPPORT STRUCTURE PLACED BETWEEN THE MAST AND BOOM OF A DRAGLINE PARTIALLY FAILED. THE TOP CROSS MEMBER OF THE STRUCTURE STRUCK THE EMPLOYEE WHO WAS IN THE MAN-BASKET OF A AERIAL L IFT. THE EMPLOYEE WAS FATALLY INJURED WHEN HE WAS CAUGHT BETWEEN THE SUPPORT STRUCTURE AND THE RAILING OF THE MAN-BASKET.
Where MidAmerican Energy Holdings Company; IDACORP stands on silica, penalties, and injury rate
MSHA's standard limits respirable silica to 50 micrograms per cubic metre, but MSHA publishes dust and quartz as separate files and never the silica figure itself. We derive it per sample, score it against the limit, and set the operator's injury rate against a benchmark built from the full MSHA operator record. With the 26-year penalty trail, contest posture, and fatality history. Delivered as a PDF with the underlying data as CSV.
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