# H & B QUARRY

- **MSHA mine ID:** 3400267
- **Status:** Abandoned
- **Type / commodity:** Surface / Gypsum
- **Location:** Blaine, OK
- **Operator:** H & B Gypsum Inc
- **Controller:** USG Corporation
- **Public source rows linked:** 11
- **Source coverage:** 4 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**USG Corporation (M00007) → H & B Gypsum Inc (L16547) → H & B QUARRY (3400267)**

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

## Controller and operator valid-time history

- **USX Corp (United States Steel Corp) → United States Steel Corp:** 1950-01-01 through 1980-10-15; derived from co-tenure at mine 3400267; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Lehigh Portland Cement Company:** 1980-10-16 through 1986-06-11; derived from co-tenure at mine 3400267; source `msha-controller-operator-history`.
- **Buzzi S p A → Heartland Cement Company-Div/Rc Cement Co Inc:** 1986-06-12 through 1995-09-10; derived from co-tenure at mine 3400267; source `msha-controller-operator-history`.
- **Donald  Boutwell → H & B Gypsum Inc:** 1995-09-11 through 1998-12-31; derived from co-tenure at mine 3400267; source `msha-controller-operator-history`.
- **USG Corporation → H & B Gypsum Inc:** 1999-01-01 through current/open; derived from co-tenure at mine 3400267; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 15
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 0 violation rows across the full record; 0 carry an S&S flag and $0 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 0 employee hours and 0 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 — 0 since 2021:** Inspections 0 inspection events and 0 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.

No retained recent violation standard resolved to the current Title 30 index.

## Source coverage

- **Addresses of Record:** 1 rows; 2000-07-07 through 2000-07-07; source ID `msha-addresses`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 1999-01-01; source ID `msha-controller-operator-history`
- **Mine Employment and Production — Quarterly:** 4 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`

## 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/h-b-quarry-3400267`
- JSON: `/api/v1/mines/h-b-quarry-3400267`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3400267/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3400267/relationships`
- MCP resource: `mine://3400267/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`