# Keystone Aggregates Inc.

- **MSHA mine ID:** 1202273
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Noble, IN
- **Operator:** Keystone Aggregates Inc.
- **Controller:** Daniel J  Hatfield; Michael J  Hatfield
- **Public source rows linked:** 468
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Daniel J  Hatfield; Michael J  Hatfield (M13210) → Keystone Aggregates Inc. (L17322) → Keystone Aggregates Inc. (1202273)**

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

## Controller and operator valid-time history

- **Daniel J  Hatfield et al → Keystone Aggregates Inc.:** 2000-04-01 through current/open; derived from co-tenure at mine 1202273; source `msha-controller-operator-history`.
- **Michael J  Hatfield et al → Keystone Aggregates Inc.:** 2000-04-01 through current/open; derived from co-tenure at mine 1202273; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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 2 historical accident/injury rows; 0 coded fatalities and 93 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 75 violation rows across the full record; 21 carry an S&S flag and $13,596 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 personal. 2 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 849 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 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 — 11 since 2021:** Inspections 49 inspection events and 634 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **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 56.20003 — 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 56.16009 — Suspended loads.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16009
- **30 CFR 56.16007 — Taglines, hitches, and slings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16007

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2003-08-21 through 2007-09-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-07-01 through 2025-07-01; source ID `msha-addresses`
- **Assessed Violations:** 75 rows; 2000-09-15 through 2025-01-15; source ID `msha-assessed-violations`
- **Controller and Operator History:** 2 rows; 2000-04-01 through 2000-04-01; source ID `msha-controller-operator-history`
- **Inspections:** 49 rows; 2000-07-18 through 2025-08-25; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 200 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:** 11 rows; 2000-07-19 through 2024-05-30; source ID `msha-personal-health-samples`
- **Violations:** 75 rows; 2000-09-15 through 2025-01-15; 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/keystone-aggregates-inc-1202273`
- JSON: `/api/v1/mines/keystone-aggregates-inc-1202273`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1202273/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1202273/relationships`
- MCP resource: `mine://1202273/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`