MINE DETAILS
Martin Marietta - Gabbs Mine
MSHA MINE ID2600002
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Martin Marietta - Gabbs Mine38.88583, -117.64361Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-17. MSHA quarterly production and employment reports.
Coal production
—reported short tons
Hours worked
—reported employee hours
Tons per hour
—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.
Quarterly data and reporting 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 |
Safety and enforcement
2025-01-01 – 2026-10-17
Violations
335 significant & substantial (S&S)
Accident records
50 records classified as fatality
Proposed penalties · USD
47,775.0033 of 33 violations with amounts
On-site inspection hours
120.004 inspections · 4 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 | 0 | 0 | — | 1 | 0 | 0 | — |
| 2025-Q2 | 17 | 2 | 12,729.00 | 2 | 0 | 1 | 46.0 |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q4 | 10 | 3 | 34,140.00 | 0 | 0 | 1 | 37.5 |
| 2026-Q1 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q2 | 6 | 0 | 906.00 | 0 | 0 | 1 | 33.0 |
| 2026-Q3 | 0 | 0 | — | 2 | 0 | 1 | 3.5 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
SLIP OR FALL OF PERSON · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Using a fire hose to wash down material into a pump. Lost footing and slipped off of an I-beam landing on it with their chest. Employee refused medical treatment at the time of the injury but went to the ER on Sunday September 27, 2026 around 2:00am. The x-ray showed a non-speraration fracture of the left 8th rib.
MACHINERY · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was laying down using a 5" vacuum hose to clean underneath of a conveyor belt. The hose lost its suction and jumped forward and then back into the face of the employee. When this happened the employee got a loose tooth from it. The employee went to the dentist two weeks later and got the tooth removed.
Verbal Hazard Complaint Inspections · 3.5 on-site hours
56.12025 · $151.00 proposed
56.23003(b) · $151.00 proposed
56.14107(a) · $151.00 proposed
56.16005 · $151.00 proposed
56.14107(a) · $151.00 proposed
47.41(a) · $151.00 proposed
Regular Safety and Health Inspection · 33.0 on-site hours
56.12028 · $755.00 proposed
56.14107(a) · $959.00 proposed
56.14112(b) · S&S · $2,503.00 proposed
56.14112(b) · $504.00 proposed
56.14107(a) · $4,047.00 proposed
56.14207 · S&S · $14,557.00 proposed
56.14107(a) · $2,712.00 proposed
56.14107(a) · $2,712.00 proposed
56.12023 · $642.00 proposed
56.4602 · S&S · $4,749.00 proposed
Regular Safety and Health Inspection · 37.5 on-site hours
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employee was using a pipe wrench and body weight to try and unjam a feeder. The pipe wrench slipped causing the employee to smash their left hand and splitting the tip of the ring finger open and needing to have stitches.
56.11002 · $151.00 proposed
46.9(b)(5) · $151.00 proposed
56.14107(a) · $366.00 proposed
Safety sources and definitions
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.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
—
Martin Marietta Materials InccontrolsMartin Marietta Materials, Inc.operatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002—
Martin Marietta Materials InccontrolsPremier Magnesia LLCoperatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002—
John Gehret et alcontrolsPremier Magnesia LLCoperatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002—
Cookson Group PlccontrolsPremier ChemicalsoperatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002—
Cummings Point IndustriescontrolsPremier Services CorpoperatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002—
Asea Brown Boveri Ltd (ABB)controlsBasic IncoperatesMartin Marietta - Gabbs Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2600002Other 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
173 historical accident/injury rows; 1 coded fatalities and 8,619 lost days across the published record.
ACCIDENT + INJURY RECORD29 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
1,199 violation rows across the full record; 217 carry an S&S flag and $1,098,569 appears in current assessed amounts.
ENFORCEMENT ACTIVITY212 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
167 personal; 9 area. 11 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 EXPOSURE176 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
38K employee hours and 77 summed average employees across reported subunits in the latest published quarter.
2002-Q40 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
541 contested-violation rows, 574 civil-penalty docket/decision rows, and 147 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE1,262 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 CONTEXT12 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
143 inspection events and 7K published inspection hours across the historical record.
OVERSIGHT COVERAGE26 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 17, 2026. 3 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 56.12025Grounding circuit enclosures.1 recent row ↗30 CFR 56.23003Requirements for written safety program.1 recent row ↗30 CFR 56.14107Moving machine parts.4 recent rows ↗30 CFR 56.16005Securing gas cylinders.1 recent row ↗30 CFR 47.41Requirement for container labels.1 recent row ↗30 CFR 56.12028Testing grounding systems.1 recent row ↗30 CFR 56.14112Construction and maintenance of guards.2 recent rows ↗30 CFR 56.14207Parking procedures for unattended equipment.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
510374056.12025Citation
510365756.23003(b)Citation
510373956.14107(a)Citation
510365656.16005Citation
510365556.14107(a)Citation
510365447.41(a)Citation
510344356.12028Citation
510344256.14107(a)Citation
Coal dust, noise and other contaminants. Silica records above ↑
Unlisted Particulate, respirable, <1% QtzPackaging Operations Worker
C/E: 00.00Concentration: 0000.83 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzLab Technician
C/E: 00.00Concentration: 0000.35 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgOiler, Greaser
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzLaborer, Bullgang
C/E: 00.00Concentration: 0000.97 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzLaborer, Bullgang
C/E: 00.00Concentration: 0002.09 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgDrill Operator, Rotary
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Nuisance dust, respirable, <1% QtzLaborer, Bullgang
C/E: 00.37Concentration: 0003.69 · limit: 0010.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors173Jan 10, 2000—Sep 21, 2026mine-keyed
Addresses of Recordidentity · logistics1Jul 21, 2009—Jul 21, 2009mine-keyed
Assessed Violationscompliance · legal1,172Apr 20, 2000—Apr 22, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal574Nov 8, 2000—Aug 11, 2025mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal147Jan 5, 2001—Jun 25, 2025mine-keyed
Contested Violationscompliance · legal541Aug 30, 2005—Nov 19, 2025mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety690Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety150Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance6Jan 1, 1950—Dec 31, 2025mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance36Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance143Mar 29, 2000—Aug 17, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety9Jul 11, 2001—Jul 19, 2018mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety167Jul 10, 2001—Apr 21, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,199Apr 20, 2000—Apr 22, 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.