MINE DETAILS
No Agua Mine & Mill
MSHA MINE ID2900248
LOCATION
Mine location
1 of 1 mine with usable MSHA coordinates. Select a marker to open a mine.
Mine coordinates
- No Agua Mine & Mill36.76083, -105.95750Open 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
83,323reported 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 | 16,393 | 0.00 | 28 | 1/1 mines reporting |
| 2025 Q2 | 0 | 14,728 | 0.00 | 28 | 1/1 mines reporting |
| 2025 Q3 | 0 | 14,719 | 0.00 | 28 | 1/1 mines reporting |
| 2025 Q4 | 0 | 11,163 | 0.00 | 27 | 1/1 mines reporting |
| 2026 Q1 | 0 | 12,327 | 0.00 | 27 | 1/1 mines reporting |
| 2026 Q2 | 0 | 13,993 | 0.00 | 28 | 1/1 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
Safety and enforcement
2025-01-01 – 2026-10-13
Violations
103 significant & substantial (S&S)
Accident records
40 records classified as fatality
Proposed penalties · USD
9,731.0010 of 10 violations with amounts
On-site inspection hours
29.255 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 | 4 | 3 | 7,189.00 | 2 | 0 | 2 | 7.0 |
| 2025-Q2 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q3 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2025-Q4 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q1 | 0 | 0 | — | 0 | 0 | 0 | — |
| 2026-Q2 | 6 | 0 | 2,542.00 | 1 | 0 | 2 | 11.5 |
| 2026-Q3 | 0 | 0 | — | 1 | 0 | 1 | 10.8 |
| 2026-Q4 * | 0 | 0 | — | 0 | 0 | 0 | — |
Most cited CFR sections
All violations issued in the selected period. Counts combine subsections.
Safety activity
Verbal Hazard Complaint Inspections · 10.8 on-site hours
HANDTOOLS (NONPOWERED) · DAYS AWAY FROM WORK ONLY
Accident narrative
The employee was using a chain fall hoist to horizontally move a separator along a beam. The separator repeatedly became bound, and during the binds jerked on the employee. After one of the binds in the chain, the employee reported feeling a burning in EE's right shoulder from the jerk of the chain. Employee was temporarily diagnosed with a rotator cuff injury.
SLIP OR FALL OF PERSON · DAYS RESTRICTED ACTIVITY ONLY
Accident narrative
Wash out
Compliance Follow-up Inspection · 1.3 on-site hours
56.20003(a) · $209.00 proposed
56.12032 · $697.00 proposed
56.12018 · $697.00 proposed
Regular Safety and Health Inspection · 10.3 on-site hours
56.4201(a)(1) · $313.00 proposed
56.4201(a)(1) · $313.00 proposed
56.4201(a)(1) · $313.00 proposed
Spot Inspection · 2.8 on-site hours
56.14112(a)(1) · $504.00 proposed
56.12034 · S&S · $1,679.00 proposed
56.14105 · S&S · $2,503.00 proposed
56.14105 · S&S · $2,503.00 proposed
Non-Fatal Accident Investigation · 4.3 on-site hours
HANDLING OF MATERIALS · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Employees were unclogging a baghouse and a hard hat fell into the screw at the bottom of the baghouse. The hard had was drawn into the screw and stopped at the rotary valve. They workers locked out the screw and valve and attempted to retrieve the hard had. When the hard hat came out, there was stored energy in the valve and it turned and caught the workers fingers.
POWERED HAULAGE · NO DYS AWY FRM WRK,NO RSTR ACT
Accident narrative
Worker was cleaning the plant floor and encountered a guard that had fallen from a head pulley on a conveyor. EE attempted to replace the guard and the active conveyor caught it. EE's hand was smashed between the guard and adjacent steel casing.
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.
—
Alleghany CorpcontrolsImerys Perlite USA, Inc.operatesNo Agua Mine & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2900248—
Imerys S AcontrolsImerys Perlite USA, Inc.operatesNo Agua Mine & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2900248—
Imerys S AcontrolsPerlite IncoperatesNo Agua Mine & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2900248—
Alleghany CorpcontrolsPerlite IncoperatesNo Agua Mine & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2900248—
Manville CorpcontrolsManville Sales CorpoperatesNo Agua Mine & Mill
msha-controller-operator-history · controller/operator co-tenure derived on mine 2900248Other 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
53 historical accident/injury rows; 0 coded fatalities and 2,527 lost days across the published record.
ACCIDENT + INJURY RECORD5 since 2021
accidentsmine-production-quarterly02 / COMPLIANCEwatch
Violations and penalties
272 violation rows across the full record; 66 carry an S&S flag and $90,468 appears in current assessed amounts.
ENFORCEMENT ACTIVITY54 since 2021
inspectionsviolationsassessed-violationsorders-107a03 / HEALTHcontext
Occupational health samples
32 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 EXPOSURE32 samples
personal-health-samples04 / PRODUCTIONcontext
Quarterly production and employment
14K employee hours and 28 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 8 conference records linked by issuance number.
POST-ISSUANCE LIFECYCLE10 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 CONTEXT1 linked entities
contractor-production-quarterlycontractor-production-yearlyaccidentsviolations07 / INSPECTIONScontext
Inspections
96 inspection events and 2K published inspection hours across the historical record.
OVERSIGHT COVERAGE15 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 56.20003Housekeeping.1 recent row ↗30 CFR 56.12032Inspection and cover plates.1 recent row ↗30 CFR 56.12018Identification of power switches.1 recent row ↗30 CFR 56.4201Inspection.3 recent rows ↗30 CFR 56.14112Construction and maintenance of guards.1 recent row ↗30 CFR 56.12034Guarding around lights.1 recent row ↗30 CFR 56.14105Procedures during repairs or maintenance.2 recent rows ↗30 CFR 56.13021High-pressure hose connections.1 recent row ↗
RECENT PUBLIC RECORDS
Recent violations and samples
Latest records retained for inspection; aggregates above use the full source history.
517383156.20003(a)Citation
517383056.12032Citation
517382956.12018Citation
517382856.4201(a)(1)Citation
517382756.4201(a)(1)Citation
517382656.4201(a)(1)Citation
979988956.14112(a)(1)Citation
979988856.12034S&S
Coal dust, noise and other contaminants. Silica records above ↑
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Nuisance dust, respirable, <1% QtzLab Technician
C/E: 00.36Concentration: 0003.63 · limit: 0010.00Source unit unspecified
Nuisance dust, respirable, <1% QtzDry Screen Plant Operator
C/E: 00.21Concentration: 0002.08 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgTruck Driver
C/E: 00.00Concentration: 0000.00 · limit: 0000.00Source unit unspecified
Unlisted Particulate, respirable, <1% QtzCrusher Oper/Worker
C/E: 00.00Concentration: 0001.67 · limit: 0000.00Source unit unspecified
Nuisance dust, respirable, <1% QtzBulldozer Operator
C/E: 00.04Concentration: 0000.41 · limit: 0010.00Source unit unspecified
Nuisance dust, respirable, <1% QtzTruck Driver
C/E: 00.01Concentration: 0000.14 · limit: 0010.00Source unit unspecified
Respirable dust, <.1mgLaborer, Bullgang
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 · contractors53Jan 14, 2000—Aug 13, 2026mine-keyed
Addresses of Recordidentity · logistics1Oct 1, 2024—Oct 1, 2024mine-keyed
Assessed Violationscompliance · legal268May 2, 2000—May 19, 2026mine-keyed
Civil Penalty Dockets and Decisionscompliance · legal1Oct 26, 2011—Oct 26, 2011mine-keyed
Coal Dust Sampleshealth · safety—No published rowsabsent / not applicable
Conferencescompliance · legal8Jul 9, 2003—Jul 9, 2003mine-keyed
Contested Violationscompliance · legal1Aug 25, 2010—Aug 25, 2010mine-keyed
Contractor Employment and Production — Quarterlycontractors · production · safety37Not published—Not publishedentity-linked
Contractor Employment and Production — Yearlycontractors · production · safety8Not published—Not publishedentity-linked
Controller and Operator Historyidentity · compliance5Jan 1, 1950—Mar 26, 2007mine-keyed
Mine Employment and Production — Quarterlyproduction · safety · compliance318Not published—Not publishedmine-keyed
Mine Employment and Production — Yearlyproduction · safety · compliance81Not published—Not publishedmine-keyed
Inspectionssafety · compliance96May 2, 2000—Sep 8, 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 · safety32May 13, 2003—Sep 10, 2026mine-keyed
Noise Sampleshealth · safety · equipment—No published rowsabsent / not applicable
Quartz Samples — Coalhealth · safety—No published rowsabsent / not applicable
Violationscompliance · safety · legal272May 2, 2000—May 19, 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.