# KEYSTONE CEMENT COMPANY

- **MSHA mine ID:** 3600125
- **Status:** Active
- **Type / commodity:** Facility / Cement
- **Location:** Northampton, PA
- **Operator:** Keystone Cement Company
- **Controller:** Elementia Materiales
- **Public source rows linked:** 8,117
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Elementia Materiales (0139981) → Keystone Cement Company (L17330) → KEYSTONE CEMENT COMPANY (3600125)**

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

## Controller and operator valid-time history

- **Giant Group Ltd → Keystone Cement Company:** 1950-01-01 through 1994-10-05; derived from co-tenure at mine 3600125; source `msha-controller-operator-history`.
- **Giant Cement Holding Inc → Keystone Cement Company:** 1994-10-06 through 1999-12-09; derived from co-tenure at mine 3600125; source `msha-controller-operator-history`.
- **Cementos Portland Valderrivas S A → Keystone Cement Company:** 1999-12-10 through 2016-10-25; derived from co-tenure at mine 3600125; source `msha-controller-operator-history`.
- **Elementia Materiales → Keystone Cement Company:** 2016-10-26 through current/open; derived from co-tenure at mine 3600125; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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 — 8 since 2021:** Accidents and injuries 113 historical accident/injury rows; 0 coded fatalities and 3,532 lost days across the published record.
2. **COMPLIANCE — 259 since 2021:** Violations and penalties 956 violation rows across the full record; 253 carry an S&S flag and $718,884 appears in current assessed amounts.
3. **HEALTH — 392 samples:** Occupational health samples 372 personal; 20 area. 5 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 59K employee hours and 169 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 198 linked rows:** Contests, conferences and decisions 86 contested-violation rows, 86 civil-penalty docket/decision rows, and 26 conference records linked by issuance number.
6. **CONTRACTORS — 43 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 — 26 since 2021:** Inspections 115 inspection events and 6K 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 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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 56.14205 — Machinery, equipment, and tools.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **30 CFR 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.13021 — High-pressure hose connections.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13021
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.20003 — Housekeeping.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 113 rows; 2000-01-11 through 2026-08-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1976-07-04 through 1976-07-04; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 20 rows; 2017-03-21 through 2017-03-21; source ID `msha-area-samples`
- **Assessed Violations:** 945 rows; 2000-04-05 through 2026-07-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 86 rows; 2008-12-10 through 2022-09-08; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 26 rows; 2003-03-03 through 2026-08-03; source ID `msha-conferences`
- **Contested Violations:** 86 rows; 2007-10-31 through 2022-02-24; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 4,114 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 882 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1999-12-10; source ID `msha-controller-operator-history`
- **Inspections:** 115 rows; 2000-04-04 through 2026-07-31; 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:** 81 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:** 372 rows; 2001-01-11 through 2024-02-07; source ID `msha-personal-health-samples`
- **Violations:** 956 rows; 2000-04-05 through 2026-07-11; 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/keystone-cement-company-3600125`
- JSON: `/api/v1/mines/keystone-cement-company-3600125`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3600125/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3600125/relationships`
- MCP resource: `mine://3600125/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`