MINE DETAILS
Twin Creeks Mine
MSHA MINE ID2601942
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Twin Creeks Mine41.21556, -117.18639Open 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
1,205,477reported 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 | 221,805 | 0.00 | 450 | 1/1 mines reporting |
| 2025 Q2 | 0 | 226,509 | 0.00 | 449 | 1/1 mines reporting |
| 2025 Q3 | 0 | 224,758 | 0.00 | 466 | 1/1 mines reporting |
| 2025 Q4 | 0 | 227,447 | 0.00 | 452 | 1/1 mines reporting |
| 2026 Q1 | 0 | 227,712 | 0.00 | 450 | 1/1 mines reporting |
| 2026 Q2 | 0 | 77,246 | 0.00 | 474 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
544 significant & substantial (S&S)
Accident records
90 records classified as fatality
Proposed penalties · USD
10,710.0044 of 54 violations with amounts
On-site inspection hours
296.5019 inspections · 19 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 | 12 | 0 | 2,576.00 | 3 | 0 | 2 | 38.3 |
| 2025-Q2 | 14 | 0 | 2,704.00 | 0 | 0 | 2 | 42.5 |
| 2025-Q3 | 1 | 0 | 151.00 | 1 | 0 | 4 | 49.8 |
| 2025-Q4 | 0 | 0 | — | 1 | 0 | 3 | 24.0 |
| 2026-Q1 | 18 | 1 | 5,279.00 | 1 | 0 | 3 | 68.3 |
| 2026-Q2 | 0 | 0 | — | 1 | 0 | 1 | 2.5 |
| 2026-Q3 | 9 | 3 | — | 2 | 0 | 4 | 71.3 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Compliance Follow-up Inspection · 1.8 on-site hours
HANDLING OF MATERIALS · DAYS AWAY FROM WORK ONLY
Accident narrative
While manually guiding a 10' PQ vertically suspended Quill Rod into position, the Helpers left 5th digit was smashed between the PQ Quill Rod and the Rod Guide on the front of the M50 drill head, resulting in a fracture to the tip (tuft) of the left pinky finger.
Compliance Follow-up Inspection · 1.3 on-site hours
103 (g) Written Notification Hazard Complaint Inspectio · 18.0 on-site hours
56.14112(b) · S&S
56.20003(a) · S&S
56.12004
56.20003(a)
56.20003(a) · S&S
56.20003(a)
Regular Safety and Health Inspection · 50.3 on-site hours
56.14206(b)
56.4102
56.14100(b)
SLIP OR FALL OF PERSON · DAYS AWAY FROM WORK ONLY
Accident narrative
IE was assisting an EE in reconnecting a broom handle to a vacuum hose, Prior to the repair, IE properly shut down the vacuum using the safety T to eliminate the vacuum hazard Once the repair was completed, EE turned to resume work while IE walked away and loss IE's footing due to slippery surfaces resulting in injuring IE's foot.
Impoundment Spot Inspection · 2.5 on-site hours
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Ee reports stepping up on top of berm while doing an inspection. EE reports feeling pop to the bottom of right foot. Seen at Golden Valley, negative for swelling, redness, numbness, tingling. Xrays taken, but no results reported. Released to modified duty and referred to podiatry.
Description not reported
OTHER · INJURIES DUE TO NATURAL CAUSES
Accident narrative
Operator on lunch saw EE's truck on pile of rocks. When contact was made, EE unresponsive, truck running, doors locked. Supervisor broke window to get to EE, EE remained unresponsive. CPR started and continued while EE transported to Hospital. This appears to be a possible cardiac event. Investigation ongoing.
Non-Chargeable Accident Investigation · 15.0 on-site hours
Impoundment Spot Inspection · 2.0 on-site hours
56.4200(b)(2) · $313.00 proposed
56.14130(g) · S&S · $465.00 proposed
56.12019 · $209.00 proposed
56.20003(a) · $209.00 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.
—
Barrick Nevada Holding LLC et alcontrolsNevada Gold Mines LLCoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942—
Newmont USA Limited et alcontrolsNevada Gold Mines LLCoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942—
Newmont CorporationcontrolsNewmont USA LimitedoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942—
Santa Fe Pacific CorpcontrolsSanta Fe Pacific Gold CorpoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942—
Hanson PLCcontrolsGold Fields Operating CompanyoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942—
Consolidated Gold Fields LimitedcontrolsGold Fields Operating CompanyoperatesTwin Creeks Mine
msha-controller-operator-history · controller/operator co-tenure derived on mine 2601942Other 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
339 historical accident/injury rows; 0 coded fatalities and 4,332 lost days across the published record.
ACCIDENT + INJURY RECORD52 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
607 violation rows across the full record; 77 carry an S&S flag and $306,317 appears in current assessed amounts.
ENFORCEMENT ACTIVITY140 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
172 personal. 13 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 EXPOSURE172 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
77K employee hours and 474 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
65 contested-violation rows, 67 civil-penalty docket/decision rows, and 35 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE167 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 CONTEXT41 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
176 inspection events and 8K published inspection hours across the historical record.
OVERSIGHT COVERAGE50 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 13, 2026. 21 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 56.14112Construction and maintenance of guards.1 recent row ↗30 CFR 56.20003Housekeeping.4 recent rows ↗30 CFR 56.12004Electrical conductors.1 recent row ↗30 CFR 56.14206Securing movable parts.1 recent row ↗30 CFR 56.4102Spillage and leakage.1 recent row ↗30 CFR 56.14100Safety defects; examination, correction and records.1 recent row ↗30 CFR 56.4200General requirements.1 recent row ↗30 CFR 56.14130Roll-over protective structures (ROPS) and seat belts.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
505918356.14112(b)S&S
505918256.20003(a)S&S
505918156.12004Citation
505918056.20003(a)Citation
505917956.20003(a)S&S
505917856.20003(a)Citation
516147056.14206(b)Citation
516146956.4102Citation
Coal dust, noise and other contaminants. Silica records above ↑
Nuisance dust, total, <1% QtzFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzBagging Operator
C/E: 00.00Concentration: 0000.00 · limit: 0010.00Source unit unspecified
Nuisance dust, total, <1% QtzBuilding Repair/Maint.
C/E: 00.05Concentration: 0000.51 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgFront-end Loader Operator
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Respirable dust, <.1mgComplete Load-Haul-Dump
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Lead, inorganic dustLab Technician
C/E: 00.03Concentration: 0005.00 · limit: 0150.00Source unit unspecified
Zinc oxide fumesLaborer, Bullgang
C/E: 00.00Concentration: 0000.00 · limit: 0005.00Source unit unspecified
Vanadium fumesLaborer, Bullgang
C/E: 00.00Concentration: 0000.00 · limit: 0050.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
15 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors339Jan 19, 2000—Aug 30, 2026mine-keyed
Addresses of Recordidentity · logistics1May 5, 1986—May 5, 1986mine-keyed
Assessed Violationscompliance · legal584Sep 18, 2000—Mar 4, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal67May 9, 2002—May 18, 2020mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal35Oct 6, 2000—Mar 14, 2025mine-keyed
Contested Violationscompliance · legal65Mar 8, 2005—Dec 17, 2019mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety8,062Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety1,657Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance6Nov 1, 1985—Jul 29, 2019mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance176Jul 11, 2000—Aug 31, 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 · safety172May 14, 2003—Aug 18, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal607Sep 18, 2000—Aug 16, 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.