# CALCIUM CARBONATE PLANT/MILL

- **MSHA mine ID:** 1800343
- **Status:** Abandoned
- **Type / commodity:** Facility / Crushed, Broken Limestone NEC
- **Location:** Baltimore, MD
- **Operator:** Imerys Carbonates USA, Inc.
- **Controller:** Imerys S A
- **Public source rows linked:** 1,369
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Imerys S A (M11763) → Imerys Carbonates USA, Inc. (L17145) → CALCIUM CARBONATE PLANT/MILL (1800343)**

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

## Controller and operator valid-time history

- **Flintkote Company → Flintkote Stone Products Company:** 1950-01-01 through 1980-04-06; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.
- **Cimenteries Cbr Cementbedrijven → Genstar Stone Products Company:** 1980-04-07 through 1986-11-03; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.
- **Redland Plc → Genstar Stone Products Company:** 1986-11-04 through 1995-11-20; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.
- **English China Clays PLC → Ecci Calcium Products Inc:** 1995-11-21 through 1999-12-31; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.
- **Imerys S A → ECCA Calcium Products Inc.:** 2000-01-01 through 2015-12-30; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.
- **Imerys S A → Imerys Carbonates USA, Inc.:** 2015-12-31 through current/open; derived from co-tenure at mine 1800343; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 18
- 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 60 historical accident/injury rows; 0 coded fatalities and 546 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 309 violation rows across the full record; 94 carry an S&S flag and $209,745 appears in current assessed amounts.
3. **HEALTH — 27 samples:** Occupational health samples 27 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.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 4K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 52 linked rows:** Contests, conferences and decisions 24 contested-violation rows, 24 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 6 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 — 0 since 2021:** Inspections 58 inspection events and 2K 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 56.12021 — Danger signs.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12021
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 60 rows; 2000-06-09 through 2017-02-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2019-03-19 through 2019-03-19; source ID `msha-addresses`
- **Assessed Violations:** 306 rows; 2000-06-21 through 2019-01-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 24 rows; 2017-10-17 through 2019-03-28; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2017-04-06 through 2017-04-06; source ID `msha-conferences`
- **Contested Violations:** 24 rows; 2016-09-14 through 2018-08-09; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 384 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 92 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2015-12-31; source ID `msha-controller-operator-history`
- **Inspections:** 58 rows; 2000-06-21 through 2018-12-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 21 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 52 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:** 27 rows; 2000-12-20 through 2018-12-18; source ID `msha-personal-health-samples`
- **Violations:** 309 rows; 2000-06-21 through 2019-01-15; 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/calcium-carbonate-plant-mill-1800343`
- JSON: `/api/v1/mines/calcium-carbonate-plant-mill-1800343`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1800343/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1800343/relationships`
- MCP resource: `mine://1800343/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`