Coal production
0reported short tons
ACTIVE / CONTROLLER PORTFOLIO
Taiheiyo Cement Corp
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MSHA CONTROLLER IDM07897
MINE PORTFOLIO
25 of 25 mines and facilities
2025-01-01 – 2026-10-18. 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 |
|---|---|---|---|---|---|---|
| AGUA FRIA PIT0202181 · Active6/8 quarters reported | Santa Cruz, AZSurface · MSHA: Construction Sand and Gravel | 0 | 18,712 | 2 | 0 | 10.3 |
| Bluelake DBA CalPortland3503537 · Active6/8 quarters reported | Multnomah, ORSurface · MSHA: Crushed, Broken Stone NEC | 0 | 8,608 | 1 | 0 | 19.0 |
| Canby Sand & Gravel DBA CalPortland3500497 · Active6/8 quarters reported | Clackamas, ORSurface · MSHA: Crushed, Broken Stone NEC | 0 | 37,040 | 7 | 1 | 45.3 |
| Diablo Plant # 1360203350 · Active6/8 quarters reported | Pinal, AZSurface · MSHA: Construction Sand and Gravel | 0 | 35,663 | 9 | 0 | 38.0 |
| Dupont Pit4503334 · Active6/8 quarters reported | Pierce, WASurface · MSHA: Construction Sand and Gravel | 0 | 156,392 | 18 | 2 | 96.3 |
| GAREY ROCK PLANT0403031 · Active6/8 quarters reported | Santa Barbara, CASurface · MSHA: Construction Sand and Gravel | 0 | 69,616 | 5 | 2 | 47.0 |
| Grimes Rock a CalPortland Company0405432 · Active6/8 quarters reported | Ventura, CASurface · MSHA: Construction Sand and Gravel | 0 | 103,305 | 18 | 3 | 45.5 |
| Jackrabbit Aggregates0203407 · Active6/8 quarters reported | Maricopa, AZSurface · MSHA: Construction Sand and Gravel | 0 | 50,640 | 4 | 1 | 22.8 |
| Lake View Quarry2602386 · Active6/8 quarters reported | Clark, NVSurface · MSHA: Gypsum | 0 | 33,441 | 3 | 0 | 19.0 |
| Mojave Plant & Quarry0400036 · Active6/8 quarters reported | Kern, CAFacility · MSHA: Cement | 0 | 511,407 | 89 | 6 | 391.8 |
| New River Plant0203367 · Active6/8 quarters reported | Maricopa, AZSurface · MSHA: Construction Sand and Gravel | 0 | 45,249 | 7 | 0 | 20.0 |
| ORANGE GROVE0201203 · Active6/8 quarters reported | Pima, AZSurface · MSHA: Construction Sand and Gravel | 0 | 46,880 | 0 | 0 | 27.0 |
| ORO GRANDE QUARRY0400011 · Active6/8 quarters reported | San Bernardino, CAFacility · MSHA: Cement | 0 | 485,226 | 71 | 8 | 340.5 |
| Redding Plant0400034 · Active6/8 quarters reported | Shasta, CASurface · MSHA: Cement | 0 | 304,690 | 49 | 5 | 139.0 |
| RILLITO PLANT0201138 · Active6/8 quarters reported | Pima, AZFacility · MSHA: Cement | 0 | 402,626 | 47 | 9 | 148.0 |
| RILLITO QUARRY0200006 · Active6/8 quarters reported | Pima, AZSurface · MSHA: Crushed, Broken Stone NEC | 0 | 56,706 | 0 | 0 | 13.8 |
| Rocky Canyon Plant0404634 · Active6/8 quarters reported | San Luis Obispo, CASurface · MSHA: Crushed, Broken Granite | 0 | 36,028 | 2 | 3 | 33.0 |
| Sanderling Dredge4503687 · Active6/8 quarters reported | Columbia, ORSurface · MSHA: Sand, Industrial NEC | 0 | 17,235 | 1 | 1 | 22.0 |
| Santosh DBA CalPortland3500525 · Active6/8 quarters reported | Columbia, ORSurface · MSHA: Construction Sand and Gravel | 0 | 190,594 | 9 | 5 | 77.5 |
| Scheerer Quarry0405907 · Active6/8 quarters reported | San Bernardino, CASurface · MSHA: Sand, Common | 0 | 72,741 | 3 | 0 | 32.0 |
| Smokey Point Pit4500574 · Active6/8 quarters reported | Snohomish, WASurface · MSHA: Construction Sand and Gravel | 0 | 19,761 | 7 | 1 | 21.8 |
| Snoqualmie S&G dba CalPortland Company4503136 · Active6/8 quarters reported | King, WASurface · MSHA: Construction Sand and Gravel | 0 | 60,334 | 54 | 2 | 105.0 |
| Twin Peaks Aggregate0202283 · Active6/8 quarters reported | Pima, AZSurface · MSHA: Construction Sand and Gravel | 0 | 25,588 | 1 | 0 | 14.5 |
| VASHON SAND AND GRAVEL dba CalPortland4501707 · Active6/8 quarters reported | King, WASurface · MSHA: Construction Sand and Gravel | 0 | 11,012 | 7 | 1 | 19.8 |
| White River Quarry4503374 · Active6/8 quarters reported | King, WASurface · MSHA: Crushed, Broken Stone NEC | 0 | 19,198 | 7 | 0 | 42.5 |
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
25 of 25 mines with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- AGUA FRIA PIT31.47306, -111.01361Open map ↗
- Bluelake DBA CalPortland45.55944, -122.44861Open map ↗
- Canby Sand & Gravel DBA CalPortland45.25361, -122.71389Open map ↗
- Diablo Plant # 13633.02222, -111.54278Open map ↗
- Dupont Pit47.12278, -122.64056Open map ↗
- GAREY ROCK PLANT34.89361, -120.29944Open map ↗
- Grimes Rock a CalPortland Company34.33472, -118.90944Open map ↗
- Jackrabbit Aggregates33.37278, -112.47861Open map ↗
- Lake View Quarry36.25444, -115.17694Open map ↗
- Mojave Plant & Quarry35.03833, -118.29472Open map ↗
- New River Plant33.84111, -112.21472Open map ↗
- ORANGE GROVE32.32444, -111.17556Open map ↗
- ORO GRANDE QUARRY34.60639, -117.33583Open map ↗
- Redding Plant40.73750, -122.31806Open map ↗
- RILLITO PLANT32.41139, -111.14944Open map ↗
- RILLITO QUARRY32.36111, -111.18722Open map ↗
- Rocky Canyon Plant35.47417, -120.61167Open map ↗
- Sanderling Dredge45.79250, -122.84389Open map ↗
- Santosh DBA CalPortland45.78722, -122.85139Open map ↗
- Scheerer Quarry34.57278, -117.26222Open map ↗
- Smokey Point Pit48.20861, -122.14472Open map ↗
- Snoqualmie S&G dba CalPortland Company47.55139, -121.81250Open map ↗
- Twin Peaks Aggregate32.35333, -111.18306Open map ↗
- VASHON SAND AND GRAVEL dba CalPortland47.38083, -122.41861Open map ↗
- White River Quarry47.18222, -121.92361Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. All 25 mines listed under this controller were checked; 25 have reports in the available quarters. Totals use current ownership.
Hours worked
2,818,692reported 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 | 520,984 | 0.00 | 850 | 25/25 mines reporting |
| 2025 Q2 | 0 | 467,645 | 0.00 | 907 | 25/25 mines reporting |
| 2025 Q3 | 0 | 470,923 | 0.00 | 891 | 25/25 mines reporting |
| 2025 Q4 | 0 | 460,764 | 0.00 | 884 | 25/25 mines reporting |
| 2026 Q1 | 0 | 461,525 | 0.00 | 890 | 25/25 mines reporting |
| 2026 Q2 | 0 | 436,851 | 0.00 | 846 | 25/25 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
42179 significant & substantial (S&S)
Accident records
500 records classified as fatality
Proposed penalties · USD
267,310.00418 of 421 violations with amounts
On-site inspection hours
1,791.00126 inspections · 126 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 | 90 | 18 | 30,259.00 | 8 | 0 | 21 | 331.3 |
| 2025-Q2 | 62 | 15 | 48,442.00 | 7 | 0 | 19 | 265.8 |
| 2025-Q3 | 30 | 4 | 5,988.00 | 5 | 0 | 14 | 195.3 |
| 2025-Q4 | 80 | 22 | 111,096.00 | 3 | 0 | 17 | 329.8 |
| 2026-Q1 | 52 | 3 | 14,920.00 | 7 | 0 | 21 | 195.8 |
| 2026-Q2 | 66 | 14 | 29,781.00 | 9 | 0 | 11 | 284.3 |
| 2026-Q3 | 41 | 3 | 26,824.00 | 11 | 0 | 23 | 189.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
- Mojave Plant & Quarry · 0400036
56.14112(b) · $504.00 proposed
- Smokey Point Pit · 4500574
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
removing a large clay ball from a grate using a pry bar the miner strained their lower back
- Mojave Plant & Quarry · 0400036
56.20003(a) · S&S · $1,818.00 proposed
- Mojave Plant & Quarry · 0400036
56.13021 · $151.00 proposed
- Mojave Plant & Quarry · 0400036
56.4201(a)(2) · $151.00 proposed
- Mojave Plant & Quarry · 0400036
56.12004 · $151.00 proposed
- Mojave Plant & Quarry · 0400036
56.12004 · $151.00 proposed
- Mojave Plant & Quarry · 0400036
56.14112(b) · $245.00 proposed
- Mojave Plant & Quarry · 0400036
56.20003(a) · S&S · $818.00 proposed
- Mojave Plant & Quarry · 0400036
Regular Safety and Health Inspection · 116.0 on-site hours
- Snoqualmie S&G dba CalPortland Company · 4503136
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
while servicing a mixer truck the employee stated they twisted their knee and strained their back
- Diablo Plant # 136 · 0203350
Compliance Follow-up Inspection · 0.5 on-site hours
- ORO GRANDE QUARRY · 0400011
STRIKING OR BUMPING · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
The employee was assigned to inspect the clinker weigh feeder due to clinker chunks that could plug the system. They lowered themselves through the safety cage to reach the clinker weigh feeder, dropping their hard hat as they moved. They hit the pins with their head as they moved up, causing a laceration.
- Redding Plant · 0400034
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
As employee was walking on catwalk to plant from production break room EE tripped while stepping up a set of two stairs. As the employee was falling, EE extended EE's left arm out in front of EE to break EE's fall onto the grating. The area was clear of debris with a light coat of dust. At this time, we don't know the result of injury but there is bruising to chest and bicep.
- VASHON SAND AND GRAVEL dba CalPortland · 4501707
Compliance Follow-up Inspection · 1.0 on-site hours
- RILLITO PLANT · 0201138
Compliance Follow-up Inspection · 10.5 on-site hours
- Diablo Plant # 136 · 0203350
Regular Safety and Health Inspection · 14.0 on-site hours
- Diablo Plant # 136 · 0203350
46.3(b)(3) · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.23003(b) · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.14100(b) · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.14201(b) · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.4503 · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.9306 · $151.00 proposed
- Diablo Plant # 136 · 0203350
56.14100(b) · $151.00 proposed
- AGUA FRIA PIT · 0202181
56.16006 · $151.00 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
2 linked operators.
Relationships reflect the selected mine status and current MSHA controller/operator fields.