MINE DETAILS
EAST BOULDER MINE
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- EAST BOULDER MINE45.50361, -110.08583Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
1,010,167reported employee hours
Tons per hour
0.00production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
Quarterly data and reporting coverage
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 169,438 | 0.00 | 362 | 1/1 mines reporting |
| 2025 Q2 | 0 | 159,784 | 0.00 | 355 | 1/1 mines reporting |
| 2025 Q3 | 0 | 168,852 | 0.00 | 353 | 1/1 mines reporting |
| 2025 Q4 | 0 | 168,584 | 0.00 | 363 | 1/1 mines reporting |
| 2026 Q1 | 0 | 171,922 | 0.00 | 364 | 1/1 mines reporting |
| 2026 Q2 | 0 | 171,587 | 0.00 | 360 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
24839 significant & substantial (S&S)
Accident records
230 records classified as fatality
Proposed penalties · USD
205,319.00244 of 248 violations with amounts
On-site inspection hours
1,530.5033 inspections · 33 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
Quarterly safety data
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 41 | 9 | 19,755.00 | 2 | 0 | 10 | 206.3 |
| 2025-Q2 | 43 | 5 | 27,042.00 | 6 | 0 | 5 | 222.3 |
| 2025-Q3 | 48 | 4 | 37,397.00 | 4 | 0 | 6 | 237.5 |
| 2025-Q4 | 33 | 1 | 18,185.00 | 3 | 0 | 2 | 197.5 |
| 2026-Q1 | 38 | 5 | 36,988.00 | 1 | 0 | 3 | 260.0 |
| 2026-Q2 | 13 | 3 | 26,329.00 | 5 | 0 | 2 | 165.0 |
| 2026-Q3 | 32 | 12 | 39,623.00 | 2 | 0 | 5 | 242.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
A mechanic was working to change a damaged hydraulic hose on a 4yd loader in the field. The mechanic was stepping away from the machine when EE lost EE's footing and fell backwards into the rib that EE was standing very near. The back of EE's hardhat contacted the rib and caused a 1" laceration to the back of the head.
MACHINERY · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee was in the process of bolting with a jackleg when a small rock (approx. 2") fell from above and contacted their left eyebrow area. The rock caused a small laceration requiring 6 sutures to close.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
During a review of audiograms by an audiologist on 6-24-26 it was reported to us that the employee sustained a reportable threshold shift in EE's hearing.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
During a review of audiograms by an audiologist on 6-24-26 it was reported to us that the employee sustained a reportable threshold shift in EE's hearing.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
3rd party audiologist confirmed a hearing reportable hearing shift on 6/24/2026
FALL OF ROOF OR BACK · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner was in process of installing collar pipe in drilled holes in mining face when a rock fell and contacted the miner. The rock contacted the employee's head back and ankle as it fell.
STEPPING OR KNEELING ON OBJECT · DAYS AWAY FROM WORK ONLY
Accident narrative
Operator stepped out of loci at the 65 722 and rolled ankle on a rock.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
On 1/6/2026 the employee was issued restrictions following an appointment to provider for arm pain. Employee was issued restriction and schedule for MRI. Initial information arm pain is caused by repetitive motion of lifting drill steel while bolting.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Third party Audiologists confirmed a reportable hearing shift of the right ear on 12/16/2025. This is a MSHA reportable STS shift if 25 dBA or more.
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Injured employee was holding a truck part while another employee used Sawzall to cut the mounting bolts. The sawblade slipped and cut employee across back of Left hand, through gloves. The employee was seen by on-site medic and referred to further care. EE received suture to close the laceration.
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
While operating a Club Car the employee reached out to push some vent line out of the way. In the process they received a laceration to the forearm. The laceration required 5 sutures to close. Employee was issued a full release.
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner was assisting partner in loading a pallet with a power cable on it. While guiding the 2yd operator up to the pallet, the bucket of the loader contacted the Miner's ankle, resulting in a fracture.
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Miner was attempting to move a unit of wire panels by hand. Afterwards felt discomfort in back.
FALL OF ROOF OR BACK · ACCIDENT ONLY
Accident narrative
Upon performing a post blast inspection at the start of night shift, a miner identified material that had fallen approximately 50' from blast area. Miner notified supervisor, incident was confirmed to meet the criteria of immediately reportable. Area was barricaded to prevent entry.
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee reports EE was drilling a reamer hole when the steel shanked. EE was contacted by an object in the shoulder but thought nothing of it. Upon changing out EE noticed a small laceration that required one suture to close.
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee inspecting shotcrete coverage on new air door install, & as EE grabbed the west de-energized air door, while pulling it open to inspect behind it, in doing so the the direction of air flow was east to west causing the east door to close resulting in EE's right hand to be pinched between the doors.
EXPLOSIVES AND BREAKING AGENTS · ACCIDENT ONLY
Accident narrative
A miner was mucking a recently blasted round. While mucking, the mucker bucket contact and initiated a primer (blasting cap). The miner was uninjuried and barricaded the area to prevent injury.
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee reports was changing steering valve assembly (approx 50 lbs). Set unit on mucker hood to continue work. It fell off the hood contacting employee's right pointer finger resting on mucker frame, causing a blow out type injury and fracturing the tip.
FALL OF ROOF OR BACK · ACCIDENT ONLY
Accident narrative
A FOG occurred in the 72 740 +280 west panel heading. The miner was remote mucking at the time when the back fell in. There was no injury.
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
While stepping out of pick-up employee slipped on small frozen puddle. Employee fell congtacting pick-up causing fracture to left forearm. Employee was given light duty restrictions and returned to work on next scheduled shift.
STRIKING OR BUMPING · DAYS AWAY FROM WORK ONLY
Accident narrative
The employee reports EE contacted EE's head while entering the rail mantrip. The contact jarred EE's neck causing pain. The employee was seen by a doctor and issued restrictions.
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee states EE was using a safety knife to cut suction hose to length. The hose and knife slipped and contacted the miner in the leg. The contact resulted in a ~2 inch laceration requiring suture to close. The employee returned to EE's next scheduled shift.
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
The employee reports was traveling down the 75 fwl in a haul truck on good roads. The parking brake set up on the truck while in motion causing the employee to twist lower back. The employee was wearing seat belt at the time. The employee was seen by a doctor and issued restrictions.
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-18.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
Sibanye Stillwater LimitedcontrolsStillwater Mining CompanyoperatesEAST BOULDER MINE
msha-controller-operator-history · controller/operator co-tenure derived on mine 2401879Stillwater Mining CompanycontrolsStillwater Mining CompanyoperatesEAST BOULDER MINE
msha-controller-operator-history · controller/operator co-tenure derived on mine 2401879Manville Corp Et AlcontrolsStillwater Pgm ResourcesoperatesEAST BOULDER MINE
msha-controller-operator-history · controller/operator co-tenure derived on mine 2401879Other historical summaries · source-specific periods
RECORD SUMMARY
Production, safety and enforcement
These summaries use the periods stated on each card, independently of the reporting period above.
Accidents and injuries
540 historical accident/injury rows; 0 coded fatalities and 14,741 lost days across the published record.
accidentsmine-production-quarterlyViolations and penalties
2,782 violation rows across the full record; 492 carry an S&S flag and $1,051,108 appears in current assessed amounts.
inspectionsviolationsassessed-violationsorders-107aOccupational health samples
399 personal; 23 area. 47 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
personal-health-samplesarea-samplesQuarterly production and employment
172K employee hours and 360 summed average employees across reported subunits in the latest published quarter.
mine-production-quarterlymine-production-yearlyContests, conferences and decisions
424 contested-violation rows, 424 civil-penalty docket/decision rows, and 39 conference records linked by issuance number.
conferencescontested-violationscivil-penalty-dockets-decisionsContractors
Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
contractor-production-quarterlycontractor-production-yearlyaccidentsviolationsInspections
305 inspection events and 36K published inspection hours across the historical record.
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 18, 2026. 10 silica records across the mine’s published history.
Personal silica samples · concentration / limit
Quarterly mean · published C/E ratio
— No eligible measurements. * Quarter in progress. Means describe the available samples, not average exposure across the mine.
Quartz % is the sample’s quartz content; µg/m³ is its reported concentration. Personal C/E is the ratio to the limit published with that sample. Personal and area concentration units and void status are not specified in those source files.
| Date / sample | Dataset / analyte | Occupation / area | Measurement | Sample status | Published action |
|---|---|---|---|---|---|
| 000000202601788400 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Crusher Oper/Worker | 0× published limitConcentration: 0000.46 · limit: 0000.00Source unit unspecified | Not reported | NO ACTIONInspection F02988F |
Sources and interpretation
- Coal means use numeric concentrations from samples marked not voided, excluding control/invalid sample types and dates after the snapshot. Missing values remain null; reported zeroes remain zero.
- Quarterly means describe available samples, not mine-wide or worker-average exposure. Quarters with no eligible measurements remain empty; the current quarter is partial.
- Personal C/E is MSHA's published concentration-to-limit ratio. A value above 1 is not by itself a citation or a determination under the 2024 silica rule. Personal and area files do not publish a void-status field.
- Area records include bulk-dust analyses and are kept separate from personal exposure results. Their concentration units are not specified in the source dictionary.
- Missing samples do not establish safe conditions. Coal quartz percentage and concentration are separate measures. No compliance threshold is inferred for coal samples.
Coal quartz field definitions ↗Metal/nonmetal personal field definitions ↗Metal/nonmetal area field definitions ↗
EIA + TITLE 30
EIA production and cited regulations
EIA annual figures are reported separately from MSHA. Regulation links use the current eCFR snapshot.
This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
Coal dust, noise and other contaminants. Silica records above ↑
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
NOTES
Limitations
- Contractor production is entity-level and is never represented as mine-attributable.
- Missing rows can mean no event, publication delay, identity mismatch, or inapplicability.