ACTIVE / OPERATOR PORTFOLIO
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MINE PORTFOLIO
2025-01-01 – 2026-10-17. Active 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 |
|---|---|---|---|---|---|---|
| Blue Rock Quarry0400276 · Active | Sonoma, CASurface · MSHA: Crushed, Broken Traprock | — | — | 4 | 0 | 46.5 |
| Mark West Quarry0400600 · Active | Sonoma, CASurface · MSHA: Crushed, Broken Stone NEC | — | — | 3 | 2 | 49.5 |
| San Rafael Rock Quarry0400021 · Active | Marin, CASurface · MSHA: Crushed, Broken Stone NEC | — | — | 2 | 2 | 28.0 |
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
3 of 3 mines with usable MSHA coordinates. Select a marker to open a mine.
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-17. All 3 mines listed under this operator were checked; 0 have reports in the available quarters. Totals use current ownership.
reported short tons
reported employee hours
production ÷ 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.
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | — | — | — | — | No report |
| 2025 Q2 | — | — | — | — | No report |
| 2025 Q3 | — | — | — | — | No report |
| 2025 Q4 | — | — | — | — | No report |
| 2026 Q1 | — | — | — | — | No report |
| 2026 Q2 | — | — | — | — | No report |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
2025-01-01 – 2026-10-17
1 significant & substantial (S&S)
0 records classified as fatality
9 of 9 violations with amounts
14 inspections · 14 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.
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 2 | 0 | 302.00 | 0 | 0 | 1 | 5.5 |
| 2025-Q2 | 2 | 1 | 848.00 | 1 | 0 | 3 | 19.8 |
| 2025-Q3 | 0 | 0 | — | 1 | 0 | 3 | 25.0 |
| 2025-Q4 | 4 | 0 | 1,358.00 | 0 | 0 | 2 | 14.0 |
| 2026-Q1 | 1 | 0 | 151.00 | 0 | 0 | 1 | 10.0 |
| 2026-Q2 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2026-Q3 | 0 | 0 | — | 1 | 0 | 4 | 49.8 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
All violations issued in the selected period. Counts combine subsections.
Spot Inspection · 9.0 on-site hours
Regular Safety and Health Inspection · 12.0 on-site hours
Regular Safety and Health Inspection · 6.5 on-site hours
Regular Safety and Health Inspection · 22.3 on-site hours
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Employee reported losing consciousness while operating a haul truck and struck a highwall. The employee sustained a minor head laceration, and the haul truck incurred minor damage.
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Strained back while rolling up a conveyor belt on the ground.
56.14100(b) · $151.00 proposed
Regular Safety and Health Inspection · 10.0 on-site hours
Regular Safety and Health Inspection · 6.5 on-site hours
56.14100(b) · $226.00 proposed
47.41(a)(1) · $226.00 proposed
56.14107(a) · $755.00 proposed
Regular Safety and Health Inspection · 7.5 on-site hours
56.4201(a)(2) · $151.00 proposed
Spot Inspection · 5.3 on-site hours
Spot Inspection · 9.0 on-site hours
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
On 8/12 employee was descending tower stair case and slipped on step and twisted lower back. On 8/19 it was brought to our attention as they wanted to seek treatment .
Spot Inspection · 10.8 on-site hours
Spot Inspection · 3.3 on-site hours
56.15005 · S&S · $697.00 proposed
HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY
Employee was injured while attempting to dislodge a rock from the portable crusher. While standing on the short stub conveyor and using a pry bar, they lost balance and fell approximately 4 feet onto the stacker conveyor below, resulting in an injury to right shoulder.
Regular Safety and Health Inspection · 6.5 on-site hours
56.4201(a)(2) · $151.00 proposed
Regular Safety and Health Inspection · 10.0 on-site hours
56.14100(b) · $151.00 proposed
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-17.
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
Relationships reflect the selected mine status and current MSHA controller/operator fields.