# Snyder

- **MSHA mine ID:** 3401651
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Kiowa, OK
- **Operator:** Martin Marietta Materials, Inc.
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 2,405
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials, Inc. (L16197) → Snyder (3401651)**

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

## Controller and operator valid-time history

- **Robert C  Thomson → Aggregate Materials:** 1988-07-01 through 1989-07-27; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.
- **Burlington Resources Inc → Meridian Gold Company:** 1989-07-28 through 1989-08-21; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.
- **Robert C  Thomson → Aggregate Materials:** 1989-08-22 through 1993-01-04; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.
- **Meridian Aggregates Company LP → Meridian Aggregates Company:** 1993-01-05 through 2001-04-02; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Meridian Aggregates Company LP:** 2001-04-03 through 2006-07-16; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials, Inc.:** 2006-07-17 through current/open; derived from co-tenure at mine 3401651; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- 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 — 3 since 2021:** Accidents and injuries 23 historical accident/injury rows; 1 coded fatalities and 403 lost days across the published record.
2. **COMPLIANCE — 29 since 2021:** Violations and penalties 193 violation rows across the full record; 55 carry an S&S flag and $63,444 appears in current assessed amounts.
3. **HEALTH — 56 samples:** Occupational health samples 56 personal. 7 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 20K employee hours and 34 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 23 linked rows:** Contests, conferences and decisions 8 contested-violation rows, 8 civil-penalty docket/decision rows, and 7 conference records linked by issuance number.
6. **CONTRACTORS — 11 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 — 17 since 2021:** Inspections 77 inspection events and 1K 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 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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 47.41 — Requirement for container labels.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **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 56.14132 — 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
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **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 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101

## Source coverage

- **Accident, Injuries, and Illnesses:** 23 rows; 2003-02-27 through 2026-07-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2005-03-03 through 2005-03-03; source ID `msha-addresses`
- **Assessed Violations:** 192 rows; 2000-01-06 through 2026-07-23; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 8 rows; 2012-01-02 through 2019-05-24; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 7 rows; 2001-12-07 through 2018-12-18; source ID `msha-conferences`
- **Contested Violations:** 8 rows; 2010-10-15 through 2018-11-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,175 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 266 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1988-07-01 through 2006-07-17; source ID `msha-controller-operator-history`
- **Inspections:** 77 rows; 2000-01-06 through 2026-07-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 312 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 80 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:** 56 rows; 2003-08-20 through 2023-02-07; source ID `msha-personal-health-samples`
- **Violations:** 193 rows; 2000-01-06 through 2026-07-23; 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/snyder-3401651`
- JSON: `/api/v1/mines/snyder-3401651`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3401651/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3401651/relationships`
- MCP resource: `mine://3401651/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`