# Shenk Quarry

- **MSHA mine ID:** 3502841
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Polk, OR
- **Operator:** D.K. Quarries
- **Controller:** Cassie E Mendoza; Marcos E Mendoza
- **Public source rows linked:** 651
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Cassie E Mendoza; Marcos E Mendoza (0176861) → D.K. Quarries (0189033) → Shenk Quarry (3502841)**

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

## Controller and operator valid-time history

- **Lloyd  Town et al → C C Meisel Company Inc:** 1978-03-09 through 1999-06-08; derived from co-tenure at mine 3502841; source `msha-controller-operator-history`.
- **Dan  Kauffman → Kauffman Quarries Inc:** 1999-06-09 through 2002-09-18; derived from co-tenure at mine 3502841; source `msha-controller-operator-history`.
- **Dan  Kauffman → D K  Quarries Inc:** 2002-09-19 through 2023-02-28; derived from co-tenure at mine 3502841; source `msha-controller-operator-history`.
- **Cassie E Mendoza et al → D.K. Quarries:** 2023-03-01 through current/open; derived from co-tenure at mine 3502841; source `msha-controller-operator-history`.
- **Marcos E Mendoza et al → D.K. Quarries:** 2023-03-01 through current/open; derived from co-tenure at mine 3502841; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 13
- 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 — 18 since 2021:** Violations and penalties 123 violation rows across the full record; 25 carry an S&S flag and $37,188 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 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 2K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 73 linked rows:** Contests, conferences and decisions 31 contested-violation rows, 31 civil-penalty docket/decision rows, and 11 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 — 13 since 2021:** Inspections 63 inspection events and 766 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 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 56.14100 — 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 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 46.6 — Newly hired experienced miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.6
- **30 CFR 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **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 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **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 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023

## Source coverage

- **Addresses of Record:** 1 rows; 2018-04-01 through 2018-04-01; source ID `msha-addresses`
- **Assessed Violations:** 120 rows; 2000-02-09 through 2026-04-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 31 rows; 2008-09-09 through 2015-12-01; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 11 rows; 2004-11-12 through 2009-01-08; source ID `msha-conferences`
- **Contested Violations:** 31 rows; 2006-12-18 through 2014-06-11; source ID `msha-contested-violations`
- **Controller and Operator History:** 5 rows; 1978-03-09 through 2023-03-01; source ID `msha-controller-operator-history`
- **Inspections:** 63 rows; 2000-02-09 through 2026-04-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 208 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 51 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:** 6 rows; 2014-06-12 through 2025-02-12; source ID `msha-personal-health-samples`
- **Violations:** 123 rows; 2000-02-09 through 2026-04-01; 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/shenk-quarry-3502841`
- JSON: `/api/v1/mines/shenk-quarry-3502841`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3502841/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3502841/relationships`
- MCP resource: `mine://3502841/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`