Coal production
0reported short tons
ALL STATUSES / OPERATOR PORTFOLIO
U S Borax Inc
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA OPERATOR IDL13075
MINE PORTFOLIO
5 of 5 mines and facilities
2025-01-01 – 2026-10-18. All statuses records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| Boron Operations0400743 · Active6/8 quarters reported | Kern, CASurface · MSHA: Boron Minerals | 0 | 2,253,991 | 140 | 14 | 626.3 |
| Owens Lake Mine0402834 · Intermittent6/8 quarters reported | Inyo, CASurface · MSHA: Trona | 0 | 14,298 | 0 | 0 | 11.0 |
| BORON OPERATIONS UNDERGROUND MIN0405366 · Abandoned | Kern, CAUnderground · MSHA: Boron Minerals | — | — | 0 | 0 | — |
| GERSTLEY MINE0404953 · Abandoned | Inyo, CAUnderground · MSHA: Boron Minerals | — | — | 0 | 0 | — |
| GERSTLEY MINE0405300 · Abandoned | Inyo, CAFacility · MSHA: Boron Minerals | — | — | 0 | 0 | — |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
Portfolio map
2 of 5 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Boron Operations35.02222, -117.70333Open map ↗
- Owens Lake Mine36.61056, -118.06556Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 5 mines listed under this operator were checked; 2 have reports in the available quarters. Totals use current ownership.
Hours worked
2,268,289reported 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 | 422,869 | 0.00 | 759 | 2/2 mines reporting |
| 2025 Q2 | 0 | 318,307 | 0.00 | 750 | 2/2 mines reporting |
| 2025 Q3 | 0 | 353,560 | 0.00 | 721 | 2/2 mines reporting |
| 2025 Q4 | 0 | 379,040 | 0.00 | 707 | 2/2 mines reporting |
| 2026 Q1 | 0 | 399,599 | 0.00 | 764 | 2/2 mines reporting |
| 2026 Q2 | 0 | 394,914 | 0.00 | 761 | 2/2 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
14034 significant & substantial (S&S)
Accident records
140 records classified as fatality
Proposed penalties · USD
162,090.00115 of 140 violations with amounts
On-site inspection hours
637.2530 inspections · 30 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 | 2 | 0 | 377.00 | 1 | 0 | 3 | 35.0 |
| 2025-Q2 | 29 | 8 | 16,055.00 | 4 | 0 | 5 | 133.3 |
| 2025-Q3 | 2 | 1 | 89,226.00 | 3 | 0 | 4 | 35.5 |
| 2025-Q4 | 43 | 6 | 25,848.00 | 4 | 0 | 2 | 131.5 |
| 2026-Q1 | 0 | 0 | — | 1 | 0 | 3 | 8.3 |
| 2026-Q2 | 4 | 2 | 6,825.00 | 0 | 0 | 3 | 26.5 |
| 2026-Q3 | 35 | 12 | 23,759.00 | 1 | 0 | 8 | 176.8 |
| 2026-Q4 * | 25 | 5 | — | 0 | 0 | 2 | 90.5 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Boron Operations · 0400743
56.9300(a) · S&S · $5,144.00 proposed
- Boron Operations · 0400743
56.18002(a) · S&S · $2,312.00 proposed
- Boron Operations · 0400743
56.16001 · $151.00 proposed
- Boron Operations · 0400743
56.12032 · $1,037.00 proposed
- Boron Operations · 0400743
HANDTOOLS (NONPOWERED) · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
While using an Iron Worker to punch out a metal plate. The Iron Worker dye broke and struck the employee in the chest.
- Boron Operations · 0400743
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Hearing loss
- Boron Operations · 0400743
103 (g) Written Notification Hazard Complaint Inspectio · 2.0 on-site hours
- Boron Operations · 0400743
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Employee has suffered a shift in their hearing baseline.
- Boron Operations · 0400743
103 (g) Written Notification Hazard Complaint Inspectio · 11.5 on-site hours
- Boron Operations · 0400743
56.14105 · S&S · $44,613.00 proposed
- Boron Operations · 0400743
Impoundment Spot Inspection · 2.0 on-site hours
- Boron Operations · 0400743
POWERED HAULAGE · PERM TOT OR PERM PRTL DISABLTY
Accident narrative
An employee was attempting to clear a blockage in the dust collector chute. While reaching in to free a pole that was being used, the employee's glove became entangled in a rotating component of the equipment. This resulted in the amputation of three fingers.
- Boron Operations · 0400743
Non-Fatal Accident Investigation · 20.0 on-site hours
- Boron Operations · 0400743
48.27(a) · $44,613.00 proposed
- Boron Operations · 0400743
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Employee suffered hearing loss
- Boron Operations · 0400743
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
The employee was using a crowbar to adjust a metal screen when the screen slipped down and pincered the employee's finger between the screen and the housing frame. Employee suffered a Broken thumb
- Boron Operations · 0400743
Impoundment Spot Inspection · 4.5 on-site hours
- Boron Operations · 0400743
56.12018 · $336.00 proposed
- Boron Operations · 0400743
56.14107(a) · $642.00 proposed
- Boron Operations · 0400743
56.11003 · $226.00 proposed
- Boron Operations · 0400743
56.12032 · $226.00 proposed
- Boron Operations · 0400743
56.14107(a) · $755.00 proposed
- Boron Operations · 0400743
56.14112(a)(1) · $177.00 proposed
- Boron Operations · 0400743
56.4104(b) · $177.00 proposed
- Boron Operations · 0400743
56.14112(a)(1) · $177.00 proposed
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.
SELECTED PORTFOLIO
1 linked controller.
Relationships reflect the selected mine status and current MSHA controller/operator fields.