# C-21

- **MSHA mine ID:** 3200629
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Ward, ND
- **Operator:** Gravel Products Inc
- **Controller:** Joel  Schriock; Hallie  Lock; William Todd  Schriock
- **Public source rows linked:** 421
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Joel  Schriock; Hallie  Lock; William Todd  Schriock (0167401) → Gravel Products Inc (L00040) → C-21 (3200629)**

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

## Controller and operator valid-time history

- **William  Schriock Jr → Gravel Products Inc:** 1979-01-01 through 2021-04-02; derived from co-tenure at mine 3200629; source `msha-controller-operator-history`.
- **Joel  Schriock et al → Gravel Products Inc:** 2021-04-03 through current/open; derived from co-tenure at mine 3200629; source `msha-controller-operator-history`.
- **Hallie  Lock et al → Gravel Products Inc:** 2021-04-03 through current/open; derived from co-tenure at mine 3200629; source `msha-controller-operator-history`.
- **William Todd  Schriock et al → Gravel Products Inc:** 2021-04-03 through current/open; derived from co-tenure at mine 3200629; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 7
- 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 — 9 since 2021:** Violations and penalties 72 violation rows across the full record; 21 carry an S&S flag and $16,808 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 8 personal; 3 area. 1 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 — 10 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 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 — 6 since 2021:** Inspections 37 inspection events and 558 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.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.16003 — Storage of hazardous materials.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16003
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.14209 — Safety procedures for towing.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14209
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — 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

## Source coverage

- **Addresses of Record:** 1 rows; 2026-05-06 through 2026-05-06; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 3 rows; 2015-05-06 through 2015-05-08; source ID `msha-area-samples`
- **Assessed Violations:** 71 rows; 2005-06-21 through 2025-03-25; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2015-06-01 through 2016-10-07; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 5 rows; 2014-09-23 through 2016-04-27; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 1979-01-01 through 1979-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 37 rows; 2003-04-15 through 2025-08-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 181 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 33 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:** 8 rows; 2009-10-21 through 2024-05-01; source ID `msha-personal-health-samples`
- **Violations:** 72 rows; 2005-06-21 through 2025-03-25; 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/c-21-3200629`
- JSON: `/api/v1/mines/c-21-3200629`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3200629/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3200629/relationships`
- MCP resource: `mine://3200629/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`