MINE DETAILS
Sweetwater Mine/Mill
MSHA MINE ID2300458
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- Sweetwater Mine/Mill37.40083, -91.07361Open map ↗
Quarterly trends
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-18. MSHA quarterly production and employment reports.
Coal production
0reported short tons
Hours worked
495,481reported 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 | 80,917 | 0.00 | 155 | 1/1 mines reporting |
| 2025 Q2 | 0 | 87,213 | 0.00 | 166 | 1/1 mines reporting |
| 2025 Q3 | 0 | 88,585 | 0.00 | 170 | 1/1 mines reporting |
| 2025 Q4 | 0 | 75,250 | 0.00 | 152 | 1/1 mines reporting |
| 2026 Q1 | 0 | 80,971 | 0.00 | 161 | 1/1 mines reporting |
| 2026 Q2 | 0 | 82,545 | 0.00 | 154 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-18
Violations
14527 significant & substantial (S&S)
Accident records
170 records classified as fatality
Proposed penalties · USD
149,990.00141 of 145 violations with amounts
On-site inspection hours
839.5022 inspections · 22 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 | 20 | 7 | 16,398.00 | 7 | 0 | 5 | 84.3 |
| 2025-Q2 | 42 | 17 | 79,154.00 | 2 | 0 | 4 | 131.8 |
| 2025-Q3 | 23 | 0 | 25,061.00 | 1 | 0 | 3 | 141.3 |
| 2025-Q4 | 11 | 0 | 4,339.00 | 2 | 0 | 1 | 90.5 |
| 2026-Q1 | 19 | 3 | 16,720.00 | 2 | 0 | 2 | 146.0 |
| 2026-Q2 | 15 | 0 | 3,933.00 | 2 | 0 | 3 | 97.3 |
| 2026-Q3 | 14 | 0 | 4,385.00 | 1 | 0 | 2 | 96.3 |
| 2026-Q4 * | 1 | 0 | — | 0 | 0 | 2 | 52.3 |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
WHILE HELPING MAINTENANCE CHANGE A BELT ON SHAKER TABLE MOTOR, A PIECE OF DRILL STEEL THAT WAS LEANED AGAINST THE TABLE STARTED TO FALL SIDEWAYS, EMPLOYEE WENT TO CATCH IT AND IT PINCHED EE'S FINGERS BETWEEN THE DRILL STEEL AND THE HANDRAIL.
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
EMPLOYEE WAS CLIMBING OFF OF A LOADER WHEN EE SLIPPED OFF OF THE CHAIN STEP, EE'S FOOT HIT THE GROUND AND EE ROLLED EE'S RIGHT ANKLE.
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS ASSISTING OPERATOR IN PULLING A WATER HOSE OFF A HOSE REEL WHEN THEY FELT A PAIN IN THE LEFT SHOULDER. EMPLOYEE WENT TO THE DOCTOR 04/07/2026 AND IS NOW ON LIGHT DUTY.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
BILATERAL CARPAL TUNNEL RIGHT HAND
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
Cubical tunnel surgery left elbow.
OTHER · INJURIES DUE TO NATURAL CAUSES
Accident narrative
EMPLOYEE FELT SICK AT THE END OF EE'S SHIFT. EE WENT TO THE ER AND FOUND OUT EE HAD BRONCHITIS. EE RECEIVED MEDICATION.
SLIP OR FALL OF PERSON · DYS AWY FRM WRK & RESTRCTD ACT
Accident narrative
Walking on walkway at loadout area and tripped on a piece of steel sticking out of walkway.
STEPPING OR KNEELING ON OBJECT · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS CLEANING UNDER 1010 BELT LINE WHEN EE WENT TO STEP OVER A ROCK AND TWISTED EE'S RIGHT KNEE.
SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS EXITING OUT OF SURFACE RECLAIM TUNNEL, BETWEEN THE STAIRS AND EXIT, TURNED RIGHT AND FELT PAIN ON THE INSIDE OF THE LEFT KNEE. THIS HAPPENED ON 05/19/2025. EE WAS NOT PLACED ON LIGHT DUTY. EE HAD SURGERY ON 08/12/2025. EE IS NOW LIGHT DUTY.
HANDLING OF MATERIALS · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS FEEDING A HYDRAULIC HOSE THROUGH THE LOWER PART OF THE SCALER WHEN EE FELT A TWEAK IN EE'S LOWER LEFT SIDE OF EE'S BACK.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
CARPAL TUNNEL SYNDROME BOTH WRISTS AND ELBOWS
HANDTOOLS (NONPOWERED) · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EMPLOYEE WAS CUTTING THICK RUBBER WHEN THE BLADE OF THE KNIFE SLIPPED AND CUT EMPLOYEE'S RIGHT SHIN.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
CARPAL TUNNEL SURGERY IN LEFT AND RIGHT WRISTS
OTHER · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS WALKING ACROSS MILL CONTROL ROOM WHEN EMPLOYEE FELT A POP IN LEFT CALF MUSCLE FOLLOWED BY PAIN.
DISORDERS (REPEATED TRAUMA) · OCCUPATNAL ILLNESS NOT DEG 1-6
Accident narrative
CARPAL TUNNEL SURGERY LEFT HAND
SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
EMPLOYEE WAS FILLING EMULSION TANK, LOST FOOTING AND FELL HITTING RIGHT KNEE ON TRUCK AND LANDING ON RIGHT ARM
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
EMPLOYEE WAS LOADING ANFO POT, LIFTED 50 LB BAG OF ANFO WHEN EMPLOYEE FELT A POP IN RIGHT SHOULDER
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.
OWNERSHIP
Operator and controller history
Current ownership comes from MSHA Mines. Historical start and end dates come from MSHA Controller and Operator History.
—
Renco Group InccontrolsDoe Run CompanyoperatesSweetwater Mine/Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300458—
Asarco InccontrolsAsarco IncoperatesSweetwater Mine/Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300458—
British Petroleum Company PLCcontrolsOzark Lead CompanyoperatesSweetwater Mine/Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300458—
Kennecott Copper CorpcontrolsOzark Lead CompanyoperatesSweetwater Mine/Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2300458Other 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
168 historical accident/injury rows; 0 coded fatalities and 1,533 lost days across the published record.
ACCIDENT + INJURY RECORD51 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
1,904 violation rows across the full record; 499 carry an S&S flag and $999,181 appears in current assessed amounts.
ENFORCEMENT ACTIVITY429 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHwatch
Occupational health samples
733 personal; 127 area. 91 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 EXPOSURE860 samples
personal-health-samplesarea-samples04 / PRODUCTIONcontext
Quarterly production and employment
83K employee hours and 154 summed average employees across reported subunits in the latest published quarter.
2026-Q20 tons
mine-production-quarterlymine-production-yearly05 / LEGALwatch
Contests, conferences and decisions
182 contested-violation rows, 181 civil-penalty docket/decision rows, and 38 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE401 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 CONTEXT18 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
280 inspection events and 15K published inspection hours across the historical record.
OVERSIGHT COVERAGE57 since 2021
inspectionsviolationsHEALTH SAMPLING
Silica and quartz
Coal quartz, metal/nonmetal personal samples and area samples. Snapshot Oct 18, 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 57.14107Moving machine parts.1 recent row ↗30 CFR 57.12004Electrical conductors.2 recent rows ↗30 CFR 57.6201Separation of transported explosive material.1 recent row ↗30 CFR 57.14100Safety defects; examination, correction and records.2 recent rows ↗30 CFR 57.14115Stationary grinding machines.1 recent row ↗30 CFR 57.12023Guarding electrical connections and resistor grids.1 recent row ↗30 CFR 57.12028Testing grounding systems.1 recent row ↗30 CFR 57.12018Identification of power switches.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
5223048—Order
522304357.14107(a)Citation
522304257.12004Citation
522304157.12004Citation
522304057.6201(a)(2)Citation
522303957.14100(b)Citation
522303857.14115(b)Citation
522303757.12023Citation
Coal dust, noise and other contaminants. Silica records above ↑
ORGANIC CARBONRoof Bolter, Rock
C/E: 00.00Concentration: 0211.00 · limit: 0000.00Source unit unspecified
EC @ 160Blaster, Powder Gang
C/E: 00.54Concentration: 0087.00 · limit: 0160.00Source unit unspecified
TC @ 160Roof Bolter, Rock
C/E: 02.19Concentration: 0350.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Scaling (mechanical)
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
TC @ 160Scaling (mechanical)
C/E: 00.81Concentration: 0129.00 · limit: 0160.00Source unit unspecified
TC from EC @ 160Roof Bolter, Rock
C/E: 00.00Concentration: 0000.00 · limit: 0160.00Source unit unspecified
EC @ 160Scaling (mechanical)
C/E: 00.61Concentration: 0098.00 · limit: 0160.00Source unit unspecified
ORGANIC CARBONBlaster, Powder Gang
C/E: 00.00Concentration: 0053.00 · limit: 0000.00Source unit unspecified
SOURCE COVERAGE
Reporting dates and coverage
16 datasets contain linked records. Missing datasets are listed below.
DATASETROWSWINDOWSTATUS
Accident, Injuries, and Illnessessafety · contractors168Jan 4, 2000—Jul 28, 2026mine-keyed
Addresses of Recordidentity · logistics1Apr 4, 1988—Apr 4, 1988mine-keyed
Assessed Violationscompliance · legal1,879Feb 24, 2000—Aug 28, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal181May 23, 2001—Sep 30, 2026mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal38Oct 20, 2000—Jul 14, 2026mine-keyed
Contested Violationscompliance · legal182Jun 2, 2009—Apr 21, 2025mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety3,165Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety698Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance4Jan 1, 1950—Sep 1, 1998mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance423Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance108Not published—Not publishedmine-keyed
Inspectionssafety · compliance280Jan 7, 2000—Oct 8, 2026mine-keyed
Minesidentity · production · logistics1Not published—Not publishedmine-keyed
Metal and Nonmetal Area Sampleshealth · safety127Aug 3, 2005—Sep 1, 2026mine-keyed
Metal and Nonmetal Personal Health Sampleshealth · safety733Aug 30, 2000—Sep 1, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal1,904Feb 24, 2000—Oct 7, 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.