ALL STATUSES / 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. 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 |
|---|---|---|---|---|---|---|
| DILLON ROAD PIT0404937 · Active | Riverside, CASurface · MSHA: Construction Sand and Gravel | — | — | 8 | 0 | 35.5 |
| Frink Pit0401910 · Intermittent | Imperial, CASurface · MSHA: Construction Sand and Gravel | — | — | 0 | 0 | 11.5 |
| MISSION GORGE PLANT0400089 · Active | San Diego, CASurface · MSHA: Construction Sand and Gravel | — | — | 16 | 0 | 48.5 |
| Superior - Twin Oaks0405514 · Active | San Diego, CASurface · MSHA: Crushed, Broken Stone NEC | — | — | 6 | 1 | 42.0 |
| EL CENTRO PROCESSING0405142 · Abandoned | Imperial, CASurface · MSHA: Construction Sand and Gravel | — | — | 3 | 0 | 4.0 |
| JAMACHA QUARRY0400135 · Abandoned | San Diego, CASurface · MSHA: Construction Sand and Gravel | — | — | 11 | 1 | 24.3 |
| La Posta Sand Plant0404947 · Abandoned | San Diego, CASurface · MSHA: Construction Sand and Gravel | — | — | 0 | 0 | — |
| Mine #10404843 · Abandoned | San Diego, CASurface · MSHA: Crushed, Broken Granite | — | — | 0 | 0 | — |
| National Quarries0400204 · Abandoned | San Diego, CASurface · MSHA: Dimension Granite | — | — | 0 | 0 | — |
| Oat Pit0405082 · Abandoned | Imperial, CASurface · MSHA: Construction Sand and Gravel | — | — | 2 | 0 | 7.8 |
| San Pasqual Quarry0405717 · Abandoned | San Diego, CASurface · MSHA: Sand, Industrial NEC | — | — | 0 | 0 | — |
| VISTA SAND WASHING PLANT0404334 · Abandoned | San Diego, CASurface · MSHA: Construction Sand and Gravel | — | — | 0 | 0 | — |
| Willow Springs Mine0405490 · Abandoned | San Diego, CASurface · MSHA: Construction Sand and Gravel | — | — | 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
11 of 13 mines with usable MSHA coordinates. Select a marker to open a mine.
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-17. All 13 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
7 significant & substantial (S&S)
0 records classified as fatality
46 of 46 violations with amounts
18 inspections · 18 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 | 14 | 4 | 3,059.00 | 0 | 0 | 5 | 48.5 |
| 2025-Q2 | 23 | 3 | 19,675.00 | 1 | 0 | 4 | 47.8 |
| 2025-Q3 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2025-Q4 | 3 | 0 | 495.00 | 0 | 0 | 3 | 15.5 |
| 2026-Q1 | 2 | 0 | 452.00 | 0 | 0 | 2 | 22.0 |
| 2026-Q2 | 4 | 0 | 6,862.00 | 0 | 0 | 3 | 31.8 |
| 2026-Q3 | 0 | 0 | — | 0 | 0 | 1 | 8.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
All violations issued in the selected period. Counts combine subsections.
Spot Inspection · 8.0 on-site hours
56.14107(a) · $151.00 proposed
56.12030 · $1,320.00 proposed
Regular Safety and Health Inspection · 14.5 on-site hours
Regular Safety and Health Inspection · 6.0 on-site hours
Regular Safety and Health Inspection · 11.3 on-site hours
56.12028 · $4,749.00 proposed
56.14200 · $642.00 proposed
Regular Safety and Health Inspection · 10.0 on-site hours
56.14107(a) · $226.00 proposed
56.14107(a) · $226.00 proposed
Regular Safety and Health Inspection · 12.0 on-site hours
Compliance Follow-up Inspection · 1.0 on-site hours
Regular Safety and Health Inspection · 5.0 on-site hours
56.13015(a) · $193.00 proposed
56.14100(b) · $151.00 proposed
56.16001 · $151.00 proposed
Regular Safety and Health Inspection · 9.5 on-site hours
HANDTOOLS (NONPOWERED) · DYS AWY FRM WRK & RESTRCTD ACT
On 9/15/2025, employee was placed on restricted duty. While employee was in the process of removing a pin with a hammer, a shard of metal entered their right upper arm. Restricted duty is being accommodated.
56.12032 · $151.00 proposed
56.12018 · $151.00 proposed
56.20011 · S&S · $465.00 proposed
56.12032 · $151.00 proposed
56.14112(a)(1) · $151.00 proposed
Regular Safety and Health Inspection · 12.0 on-site hours
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.