MINE DETAILS
Smoky Valley Common Operation-UG
MSHA MINE ID2602584
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Smoky Valley Common Operation-UG38.70556, -117.15889Open 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
87,845reported 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 | 9,556 | 0.00 | 18 | 1/1 mines reporting |
| 2025 Q2 | 0 | 10,644 | 0.00 | 21 | 1/1 mines reporting |
| 2025 Q3 | 0 | 11,985 | 0.00 | 22 | 1/1 mines reporting |
| 2025 Q4 | 0 | 11,842 | 0.00 | 25 | 1/1 mines reporting |
| 2026 Q1 | 0 | 14,398 | 0.00 | 25 | 1/1 mines reporting |
| 2026 Q2 | 0 | 29,420 | 0.00 | 40 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
172 significant & substantial (S&S)
Accident records
30 records classified as fatality
Proposed penalties · USD
35,830.0014 of 17 violations with amounts
On-site inspection hours
150.259 inspections · 9 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 | — | 0 | 0 | 1 | 16.5 |
| 2025-Q2 | 3 | 0 | 3,378.00 | 0 | 0 | 1 | 25.5 |
| 2025-Q3 | 1 | 0 | 151.00 | 0 | 0 | 1 | 15.8 |
| 2025-Q4 | 6 | 0 | 6,811.00 | 0 | 0 | 1 | 17.3 |
| 2026-Q1 | 1 | 0 | 1,219.00 | 1 | 0 | 1 | 20.5 |
| 2026-Q2 | 3 | 1 | 24,094.00 | 1 | 0 | 2 | 47.8 |
| 2026-Q3 | 2 | 1 | 177.00 | 1 | 0 | 1 | 7.0 |
| 2026-Q4 * | 1 | 0 | — | 0 | 0 | 1 | 0.0 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
57.14207
Regular Safety and Health Inspection · 0.0 on-site hours
57.3360 · S&S
EXPLODING VESSELS UNDER PRESSURE · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Employee was tramming a bolter to the shop when the bolter suddenly stopped, employee went to see if there was any obvious reason for the bolter to stop when loud pop was heard. The coolant tank sight glass failed, spraying the employee with hot coolant and hydraulic oil. Employee got burns on chest, neck, hands, chin, mouth and nose and was prescribed burn cream and pain reliever.
Regular Safety and Health Inspection · 7.0 on-site hours
57.13015(a) · $177.00 proposed
Description not reported
FALL OF ROOF OR BACK · ACCIDENT ONLY
Accident narrative
At approximately 7:20PM the shift supervisor was conducting work area inspections, finding a fall of ground in the 3800 ramp. The fall of ground was above the anchorage zone in an active working area that impeded passage.
Non-Injury Accident Investigation · 18.5 on-site hours
Regular Safety and Health Inspection · 29.3 on-site hours
57.14100(b) · S&S · $20,047.00 proposed
57.12008 · $4,047.00 proposed
47.41(a) · $1,219.00 proposed
Regular Safety and Health Inspection · 20.5 on-site hours
HANDTOOLS (NONPOWERED) · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Employee was attempting to adjust bolt alignment fingers on bolter using a hammer, while doing so the employees left hand pinky finger got caught between the hammer and the alignment finger causing a laceration. Employee received 7 stitches.
57.14100(c) · $151.00 proposed
48.7(a) · $168.00 proposed
47.41(a) · $1,126.00 proposed
57.14100(c) · $1,126.00 proposed
57.12010 · $504.00 proposed
57.12008 · $3,736.00 proposed
Regular Safety and Health Inspection · 17.3 on-site hours
45.4(b) · $151.00 proposed
Regular Safety and Health Inspection · 15.8 on-site hours
57.11051(b) · $1,126.00 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.
—
Echo Bay Mines LtdcontrolsRound Mountain Gold CorporationoperatesSmoky Valley Common Operation-UG
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602584—
Kinross Gold CorporationcontrolsRound Mountain Gold CorporationoperatesSmoky Valley Common Operation-UG
msha-controller-operator-history · controller/operator co-tenure derived on mine 2602584Other 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
8 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
ACCIDENT + INJURY RECORD7 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
41 violation rows across the full record; 2 carry an S&S flag and $40,561 appears in current assessed amounts.
ENFORCEMENT ACTIVITY35 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
11 personal; 8 area. 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 EXPOSURE19 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
29K employee hours and 40 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
6 contested-violation rows, 6 civil-penalty docket/decision rows, and 8 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE20 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 CONTEXT3 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
29 inspection events and 760 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. 2 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 |
|---|---|---|---|---|---|
| 000000202601779000 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Truck Driver | 0.17× published limitConcentration: 0000.16 · limit: 0000.96Source unit unspecified | Not reported | NO ACTIONInspection F031E1E |
| 000000202601779100 | Metal/nonmetal personalQuartz, respirable, >1% Qtz | Truck Driver | 0.35× published limitConcentration: 0000.28 · limit: 0000.79Source unit unspecified | Not reported | NO ACTIONInspection F031E1E |
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 57.14207Parking procedures for unattended equipment.1 recent row ↗30 CFR 57.3360Ground support use.1 recent row ↗30 CFR 57.13015Inspection of compressed-air receivers and other unfired pressure vessels.1 recent row ↗30 CFR 57.14100Safety defects; examination, correction and records.3 recent rows ↗30 CFR 57.12008Insulation and fittings for power wires and cables.1 recent row ↗30 CFR 47.41Requirement for container labels.2 recent rows ↗30 CFR 48.7Training of miners assigned to a task in which they have had no previous experience; minimum courses of instruction.1 recent row ↗30 CFR 57.12010Isolation or insulation of communication conductors.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
510832257.14207Citation
510803157.3360S&S
510824057.13015(a)Citation
5103293—Order
510365957.14100(b)S&S
510365857.12008Citation
510356647.41(a)Citation
510337957.14100(c)Citation
Coal dust, noise and other contaminants. Silica records above ↑
TC from EC @ 160Shotcrete/Gunite Man
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Shotcrete/Gunite Man
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONShotcrete/Gunite Man
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Shotcrete/Gunite Man
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Ventilation Crew
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Ventilation Crew
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONVentilation Crew
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
EC @ 160Ventilation Crew
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors8Nov 8, 2006—Sep 3, 2026mine-keyed
Addresses of Recordidentity · logistics1Feb 20, 2023—Feb 20, 2023mine-keyed
Assessed Violationscompliance · legal38Mar 15, 2006—Jul 15, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal6Sep 24, 2024—Dec 11, 2025mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal8Apr 7, 2006—Jan 14, 2026mine-keyed
Contested Violationscompliance · legal6Feb 24, 2024—Apr 28, 2026mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety589Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety136Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance2Feb 27, 2006—Feb 27, 2006mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance62Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance14Not published—Not publishedmine-keyed
Inspectionssafety · compliance29Mar 13, 2006—Oct 5, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety8Nov 20, 2024—Jan 27, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety11Nov 20, 2024—Apr 29, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal41Mar 15, 2006—Oct 6, 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.