# Grefco Mine & Mill

- **MSHA mine ID:** 2600125
- **Status:** Active
- **Type / commodity:** Surface / Diatomaceous Earth (Diatomite)
- **Location:** Nye, NV
- **Operator:** Grefco Minerals LLC
- **Controller:** Dicalite Management Group LLC
- **Public source rows linked:** 1,212
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Dicalite Management Group LLC (M00074) → Grefco Minerals LLC (0170893) → Grefco Mine & Mill (2600125)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Dicalite Management Group LLC → Grefco Minerals Inc:** 1950-01-01 through 2019-06-05; derived from co-tenure at mine 2600125; source `msha-controller-operator-history`.
- **Dicalite Management Group LLC → Grefco Minerals LLC:** 2019-06-06 through current/open; derived from co-tenure at mine 2600125; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 20 historical accident/injury rows; 0 coded fatalities and 176 lost days across the published record.
2. **COMPLIANCE — 36 since 2021:** Violations and penalties 217 violation rows across the full record; 55 carry an S&S flag and $47,330 appears in current assessed amounts.
3. **HEALTH — 21 samples:** Occupational health samples 21 personal. 1 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.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 9K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 36 linked rows:** Contests, conferences and decisions 16 contested-violation rows, 16 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 2 linked entities:** 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.
7. **INSPECTIONS — 13 since 2021:** Inspections 68 inspection events and 1K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015
- **30 CFR 45.4 — Independent contractor register.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-45/section-45.4
- **30 CFR 48.23 — Training plans; time of submission; where filed; information required; time for approval; method for disapproval; commencement of training; approval of instructors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.23
- **30 CFR 48.29 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.29
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 48.11 — Hazard training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-A/section-48.11
- **30 CFR 47.51 — Requirement for an MSDS.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-F/section-47.51
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41

## Source coverage

- **Accident, Injuries, and Illnesses:** 20 rows; 2000-09-08 through 2019-02-21; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-10-01 through 2013-10-01; source ID `msha-addresses`
- **Assessed Violations:** 215 rows; 2000-12-19 through 2026-04-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 16 rows; 2007-02-13 through 2011-08-09; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2010-08-02 through 2025-05-28; source ID `msha-conferences`
- **Contested Violations:** 16 rows; 2006-06-14 through 2010-10-14; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 186 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 53 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1950-01-01 through 2019-06-06; source ID `msha-controller-operator-history`
- **Inspections:** 68 rows; 2000-12-19 through 2026-04-06; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 315 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 77 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 21 rows; 2003-08-14 through 2025-04-16; source ID `msha-personal-health-samples`
- **Violations:** 217 rows; 2000-12-19 through 2026-04-08; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/grefco-mine-mill-2600125`
- JSON: `/api/v1/mines/grefco-mine-mill-2600125`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2600125/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2600125/relationships`
- MCP resource: `mine://2600125/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`