# Crystal Blue Quarries Inc

- **MSHA mine ID:** 0900994
- **Status:** Active
- **Type / commodity:** Surface / Dimension Stone NEC
- **Location:** Elbert, GA
- **Operator:** Crystal Blue Quarry Inc
- **Controller:** Edwin C  Williams
- **Public source rows linked:** 718
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Edwin C  Williams (M40294) → Crystal Blue Quarry Inc (L03282) → Crystal Blue Quarries Inc (0900994)**

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

## Controller and operator valid-time history

- **Walter Allen  Mc Cannon → Crystal Blue Quarry Inc:** 1987-02-01 through 2022-12-31; derived from co-tenure at mine 0900994; source `msha-controller-operator-history`.
- **Edwin C  Williams → Crystal Blue Quarry Inc:** 2023-01-01 through current/open; derived from co-tenure at mine 0900994; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 15 since 2021:** Violations and penalties 175 violation rows across the full record; 50 carry an S&S flag and $41,794 appears in current assessed amounts.
3. **HEALTH — 40 samples:** Occupational health samples 40 personal. 9 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 7K employee hours and 18 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 194 linked rows:** Contests, conferences and decisions 77 contested-violation rows, 77 civil-penalty docket/decision rows, and 40 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 15 since 2021:** Inspections 92 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 56.12004 — Electrical conductors.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14115 — Stationary grinding machines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14115
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.6102 — Explosive material storage practices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-E/section-56.6102
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2001-02-15 through 2001-02-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1987-02-03 through 1987-02-03; source ID `msha-addresses`
- **Assessed Violations:** 173 rows; 2000-05-03 through 2025-09-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 77 rows; 2009-03-25 through 2013-06-04; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 40 rows; 2008-05-16 through 2013-03-13; source ID `msha-conferences`
- **Contested Violations:** 77 rows; 2007-09-25 through 2010-10-28; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 1987-02-01 through 1987-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 92 rows; 2000-05-03 through 2026-07-22; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 12 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 40 rows; 2004-06-23 through 2024-02-20; source ID `msha-personal-health-samples`
- **Violations:** 175 rows; 2000-05-03 through 2025-09-10; 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/crystal-blue-quarries-inc-0900994`
- JSON: `/api/v1/mines/crystal-blue-quarries-inc-0900994`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0900994/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0900994/relationships`
- MCP resource: `mine://0900994/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`