MINE DETAILS
Pacific Aggregates Pits
MSHA MINE ID0405635
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Pacific Aggregates Pits33.71167, -117.39472Open 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
159,320reported 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 | 30,380 | 0.00 | 56 | 1/1 mines reporting |
| 2025 Q2 | 0 | 31,222 | 0.00 | 53 | 1/1 mines reporting |
| 2025 Q3 | 0 | 28,601 | 0.00 | 50 | 1/1 mines reporting |
| 2025 Q4 | 0 | 20,449 | 0.00 | 48 | 1/1 mines reporting |
| 2026 Q1 | 0 | 21,098 | 0.00 | 48 | 1/1 mines reporting |
| 2026 Q2 | 0 | 27,570 | 0.00 | 48 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
72 significant & substantial (S&S)
Accident records
90 records classified as fatality
Proposed penalties · USD
741.004 of 7 violations with amounts
On-site inspection hours
44.505 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 | 2 | 0 | 302.00 | 0 | 0 | 1 | 9.5 |
| 2025-Q2 | 1 | 1 | 288.00 | 4 | 0 | 1 | 10.5 |
| 2025-Q3 | 0 | 0 | — | 2 | 0 | 0 | — |
| 2025-Q4 | 1 | 0 | 151.00 | 0 | 0 | 2 | 12.5 |
| 2026-Q1 | 0 | 0 | — | 2 | 0 | 0 | — |
| 2026-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q3 | 3 | 1 | — | 1 | 0 | 1 | 12.0 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
56.11001 · S&S
56.9300(a)
Regular Safety and Health Inspection · 12.0 on-site hours
56.11003
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
None
SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was at the belt press area, they slipped and when they fell, they hit their head on the ground.
STRIKING OR BUMPING · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Employee slipped, fell on their back and hit their toe on something that was nearby and also hit their head on the ground. Employee said they felt fine but out of precautionary measures we sent them to the clinic for a check up.
Compliance Follow-up Inspection · 1.0 on-site hours
56.12002 · $151.00 proposed
Regular Safety and Health Inspection · 11.5 on-site hours
SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Employee was using a hose to spray pump, employee was putting the hose away and their leg went through the hole on the grading causing leg abrasions and sore back.
POWERED HAULAGE · DAYS AWAY FROM WORK ONLY
Accident narrative
Employee was driving the haul truck when they hit a bump in the road, felt back getting tight over the next 10 minutes after hitting the bump.
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was unloading a truck when they felt pain on right shoulder.
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was operating heavy equipment when they started feeling pain in lower back - employee was unsure as to what initially caused it.
Regular Safety and Health Inspection · 10.5 on-site hours
56.11001 · S&S · $288.00 proposed
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
The employee was trimming a piece of plastic with a razor knife.
SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee slipped on a wet platform as they stepped off the last step on stairs.
Regular Safety and Health Inspection · 9.5 on-site hours
56.14107(a) · $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.
—
David Murdock Living TrustcontrolsPacific Aggregates IncoperatesPacific Aggregates Pits
msha-controller-operator-history · controller/operator co-tenure derived on mine 0405635—
David H MurdockcontrolsPacific Aggregates IncoperatesPacific Aggregates Pits
msha-controller-operator-history · controller/operator co-tenure derived on mine 0405635Other 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
72 historical accident/injury rows; 0 coded fatalities and 1,848 lost days across the published record.
ACCIDENT + INJURY RECORD18 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
243 violation rows across the full record; 83 carry an S&S flag and $120,203 appears in current assessed amounts.
ENFORCEMENT ACTIVITY35 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
20 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 EXPOSURE20 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
28K employee hours and 48 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
1 contested-violation rows, 1 civil-penalty docket/decision rows, and 11 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE13 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 CONTEXT8 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
76 inspection events and 2K published inspection hours across the historical record.
OVERSIGHT COVERAGE21 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 1 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 56.11001Safe access.2 recent rows ↗30 CFR 56.9300Berms or guardrails.1 recent row ↗30 CFR 56.11003Construction and maintenance of ladders.1 recent row ↗30 CFR 56.12002Controls and switches.1 recent row ↗30 CFR 56.14107Moving machine parts.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 46.7New task training.1 recent row ↗30 CFR 56.14131Seat belts for haulage trucks.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
516532356.11001S&S
516532256.9300(a)Citation
516532156.11003Citation
516523656.12002Citation
989217956.11001S&S
989289956.14107(a)Citation
989289856.14100(b)Citation
989234746.7(a)S&S
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgWasher Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgScreen/Scalper Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
15 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors72Jun 10, 2005—Aug 13, 2026mine-keyed
Addresses of Recordidentity · logistics1Jul 30, 2005—Jul 30, 2005mine-keyed
Assessed Violationscompliance · legal237Aug 16, 2005—Oct 7, 2025mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal1Aug 11, 2015—Aug 11, 2015mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal11Jun 16, 2006—Jun 8, 2017mine-keyed
Contested Violationscompliance · legal1Dec 23, 2014—Dec 23, 2014mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety573Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety120Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Apr 16, 2005—Apr 16, 2005mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance172Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance44Not published—Not publishedmine-keyed
Inspectionssafety · compliance76Aug 15, 2005—Sep 9, 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 · safety20Aug 17, 2005—Sep 10, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal243Aug 16, 2005—Sep 10, 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.