# Diamond #1885

- **MSHA mine ID:** 3401660
- **Status:** Abandoned
- **Type / commodity:** Surface / Gypsum
- **Location:** Blaine, OK
- **Operator:** Arcosa Specialty Materials
- **Controller:** Arcosa, Inc
- **Public source rows linked:** 412
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Arcosa, Inc (0144281) → Arcosa Specialty Materials (0160833) → Diamond #1885 (3401660)**

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

## Controller and operator valid-time history

- **Clayton  Hufnagel → Diamond Gypsum Company:** 1988-11-01 through 2017-07-24; derived from co-tenure at mine 3401660; source `msha-controller-operator-history`.
- **H I G Capital LLC → ACG Materials:** 2017-07-25 through 2018-12-05; derived from co-tenure at mine 3401660; source `msha-controller-operator-history`.
- **Charles W  Harrison Jr → ACG Materials:** 2017-07-25 through 2014-07-14; derived from co-tenure at mine 3401660; source `msha-controller-operator-history`.
- **Arcosa, Inc → Arcosa Specialty Materials:** 2018-12-06 through current/open; derived from co-tenure at mine 3401660; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- Interval anomalies: 1
- 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 — 4 since 2021:** Violations and penalties 32 violation rows across the full record; 9 carry an S&S flag and $4,162 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 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 472 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 5 since 2021:** Inspections 53 inspection events and 474 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 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **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 56.9300 — Berms or guardrails.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132

## Source coverage

- **Addresses of Record:** 1 rows; 2024-07-08 through 2024-07-08; source ID `msha-addresses`
- **Assessed Violations:** 32 rows; 2000-05-10 through 2024-06-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2014-08-27 through 2014-08-27; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2014-01-31 through 2014-01-31; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 35 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 10 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1988-11-01 through 2018-12-06; source ID `msha-controller-operator-history`
- **Inspections:** 53 rows; 2000-05-10 through 2025-03-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 177 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 46 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:** 19 rows; 2001-03-22 through 2021-03-23; source ID `msha-personal-health-samples`
- **Violations:** 32 rows; 2000-05-10 through 2024-06-13; 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/diamond-1885-3401660`
- JSON: `/api/v1/mines/diamond-1885-3401660`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3401660/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3401660/relationships`
- MCP resource: `mine://3401660/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`