MINE DETAILS
Kaycee Mine
MSHA MINE ID4800877
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Kaycee Mine43.81167, -106.76361Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
40,141reported 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 | 6,552 | 0.00 | 13 | 1/1 mines reporting |
| 2025 Q2 | 0 | 7,774 | 0.00 | 15 | 1/1 mines reporting |
| 2025 Q3 | 0 | 7,943 | 0.00 | 15 | 1/1 mines reporting |
| 2025 Q4 | 0 | 6,280 | 0.00 | 11 | 1/1 mines reporting |
| 2026 Q1 | 0 | 5,471 | 0.00 | 11 | 1/1 mines reporting |
| 2026 Q2 | 0 | 6,121 | 0.00 | 12 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
142 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
2,682.0014 of 14 violations with amounts
On-site inspection hours
62.005 inspections · 5 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 | 4 | 0 | 604.00 | 0 | 0 | 1 | 10.0 |
| 2025-Q2 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2025-Q3 | 4 | 0 | 604.00 | 0 | 0 | 2 | 29.5 |
| 2025-Q4 | 2 | 1 | 655.00 | 0 | 0 | 1 | 10.0 |
| 2026-Q1 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q2 | 4 | 1 | 819.00 | 1 | 0 | 1 | 12.5 |
| 2026-Q3 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EE was operating a scraper and was going down hill. EE said a plastic bottle got under EE's brake pedal and kept EE from stopping. EE was bounced around in EE's seat and was finally able to lower the scraper bowl to stop the scraper. EE suffered a light abrasion to EE's right shin and soft tissue soreness to EE's back. EE was wearing EE's seatbelt.
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Contractor EE was repairing a ripper tooth from a D10 Dozer. EE hit the ripper tooth with a hammer a couple of times to get it in place for the retaining pin. A piece of metal sheared off of the ripper and embedded into the EE's left arm. EE eventually went to the ER for treatment. It was removed and EE was prescribed antibiotics.
56.12030 · $151.00 proposed
56.14206(b) · $151.00 proposed
56.14132(b)(1) · $151.00 proposed
Regular Safety and Health Inspection · 12.5 on-site hours
56.14130(g) · S&S · $366.00 proposed
HANDLING OF MATERIALS · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
EE was loading 18" culverts onto a trailer when one became unstable. EE tried to stop and reload it back onto the trailer. EE felt a pop on the inside of right elbow. EE suffered a torn distal biceps tendon.
56.14100(c) · S&S · $504.00 proposed
47.51 · $151.00 proposed
Regular Safety and Health Inspection · 10.0 on-site hours
Verbal Hazard Complaint Inspections · 1.5 on-site hours
56.12018 · $151.00 proposed
56.4201(a)(1) · $151.00 proposed
56.4201(a)(2) · $151.00 proposed
56.12018 · $151.00 proposed
Regular Safety and Health Inspection · 28.0 on-site hours
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
EE was cleaning out a scraper bowl when they slipped and fell backwards into the bowl. EE was waiting on a doctor's appointment for follow up. EE is now on injury leave awaiting further tests and treatment.
Regular Safety and Health Inspection · 10.0 on-site hours
56.12030 · $151.00 proposed
56.14130(i) · $151.00 proposed
56.14100(b) · $151.00 proposed
56.14100(b) · $151.00 proposed
Safety sources and definitions
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
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.
—
BHB Limited Partnership et alcontrolsBlack Hills Bentonite LLCoperatesKaycee Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 4800877—
A&M Products et alcontrolsBlack Hills Bentonite LLCoperatesKaycee Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 4800877—
Thomas A Thorson et alcontrolsBlack Hills Bentonite LLCoperatesKaycee Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 4800877—
T A ThorsoncontrolsKaycee Bentonite CorpoperatesKaycee Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 4800877Other 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.
01 / SAFETYwatch
Accidents and injuries
29 historical accident/injury rows; 0 coded fatalities and 1,178 lost days across the published record.
ACCIDENT + INJURY RECORD10 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
121 violation rows across the full record; 21 carry an S&S flag and $22,139 appears in current assessed amounts.
ENFORCEMENT ACTIVITY52 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
23 personal. 0 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.
OCCUPATIONAL EXPOSURE23 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
6K employee hours and 12 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALneutral
Contests, conferences and decisions
0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE0 linked rows
conferencescontested-violationscivil-penalty-dockets-decisions06 / CONTRACTORScontext
Contractors
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.
ENTITY-LEVEL CONTEXT5 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
66 inspection events and 1K published inspection hours across the historical record.
OVERSIGHT COVERAGE15 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 4 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 |
|---|---|---|---|---|---|
| No silica records match these filters. Missing samples do not establish safe conditions. | |||||
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.
Not present in the 2024 EIA coal workbook.
This can mean the operation is non-coal, inactive for the annual period, or outside the EIA-7A reporting population.
30 CFR 56.12030Correction of dangerous conditions.2 recent rows ↗30 CFR 56.14206Securing movable parts.1 recent row ↗30 CFR 56.14132Horns and backup alarms.1 recent row ↗30 CFR 56.14130Roll-over protective structures (ROPS) and seat belts.2 recent rows ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 47.51Requirement for an MSDS.1 recent row ↗30 CFR 56.12018Identification of power switches.2 recent rows ↗30 CFR 56.4201Inspection.2 recent rows ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
503376756.12030Citation
503376656.14206(b)Citation
503376556.14132(b)(1)Citation
503376456.14130(g)S&S
973279956.14100(c)S&S
973279847.51Citation
503691556.12018Citation
503691456.4201(a)(1)Citation
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgScraper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgScraper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgScraper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgBulldozer Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgBulldozer Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgScraper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTractor Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgScraper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
12 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors29Dec 18, 2001—Sep 18, 2026mine-keyed
Addresses of Recordidentity · logistics1Jan 20, 2023—Jan 20, 2023mine-keyed
Assessed Violationscompliance · legal119Apr 25, 2001—Apr 17, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal—No published rowsabsent / not applicable
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal—No published rowsabsent / not applicable
Contested Violationscompliance · legal—No published rowsabsent / not applicable
Contractor Employment and Production — Quarterlycontractors · production · safety180Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety49Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Jan 1, 1950—Jan 1, 1987mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance106Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance27Not published—Not publishedmine-keyed
Inspectionssafety · compliance66Mar 29, 2000—Apr 15, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety—No published rowsabsent / not applicable
Metal and Nonmetal Personal Health Sampleshealth · safety23Jul 20, 2005—Oct 9, 2025mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal121Mar 27, 2001—Apr 17, 2026mine-keyed
107(a) Orders Issuedsafety · compliance—No published rowsabsent / not applicable
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.