# HARPER QUARRY

- **MSHA mine ID:** 4102822
- **Status:** Active
- **Type / commodity:** Surface / Gypsum
- **Location:** Kimble, TX
- **Operator:** Gold Bond Building Products, LLC
- **Controller:** NG Operations LLC
- **Public source rows linked:** 862
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**NG Operations LLC (0160281) → Gold Bond Building Products, LLC (0175133) → HARPER QUARRY (4102822)**

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

## Controller and operator valid-time history

- **Hugo C  Werner → Avalon Industries Inc:** 1979-01-01 through 1981-10-19; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **Lafarge S A → Gold Bond Building Products:** 1981-10-20 through 1993-06-30; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **National Gypsum Company → National Gypsum Company:** 1993-07-01 through 1995-09-20; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **Spangler Companies Inc → New NGC, Inc.:** 1995-09-21 through 2004-03-31; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **Spangler Companies Inc → National Gypsum of Texas, LP:** 2004-04-01 through 2007-12-31; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **Spangler Companies Inc → New NGC Incorporated:** 2008-01-01 through 2021-10-11; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.
- **NG Operations LLC → Gold Bond Building Products, LLC:** 2021-10-12 through current/open; derived from co-tenure at mine 4102822; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 20
- 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 4 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 57 violation rows across the full record; 4 carry an S&S flag and $7,515 appears in current assessed amounts.
3. **HEALTH — 15 samples:** Occupational health samples 15 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 5K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 16 linked rows:** Contests, conferences and decisions 8 contested-violation rows, 8 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 59 inspection events and 677 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 56.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23003
- **30 CFR 48.31 — Hazard training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.31
- **30 CFR 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 47.32 — HazCom program contents.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-D/section-47.32
- **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 56.14116 — Hand-held power tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14116
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2003-07-11 through 2017-10-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1981-10-20 through 1981-10-20; source ID `msha-addresses`
- **Assessed Violations:** 57 rows; 2001-07-17 through 2025-04-02; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 8 rows; 2011-11-07 through 2021-05-13; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 8 rows; 2010-08-04 through 2020-11-18; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 332 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 48 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1979-01-01 through 2021-10-12; source ID `msha-controller-operator-history`
- **Inspections:** 59 rows; 2000-06-29 through 2026-04-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 211 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 15 rows; 2009-04-01 through 2025-01-29; source ID `msha-personal-health-samples`
- **Violations:** 57 rows; 2001-07-17 through 2025-04-02; 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/harper-quarry-4102822`
- JSON: `/api/v1/mines/harper-quarry-4102822`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4102822/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4102822/relationships`
- MCP resource: `mine://4102822/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`