# Bluffton Stone Company LLC.

- **MSHA mine ID:** 3300017
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Allen, OH
- **Operator:** Bluffton Stone Company
- **Controller:** Brent  Gerken; Michael J  Gerken
- **Public source rows linked:** 1,624
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Brent  Gerken; Michael J  Gerken (M08470) → Bluffton Stone Company (L10940) → Bluffton Stone Company LLC. (3300017)**

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

## Controller and operator valid-time history

- **Maurice  Fett → Bluffton Stone Company:** 1950-01-01 through 1989-07-10; derived from co-tenure at mine 3300017; source `msha-controller-operator-history`.
- **Michael J  Gerken et al → Bluffton Stone Company:** 1989-07-11 through current/open; derived from co-tenure at mine 3300017; source `msha-controller-operator-history`.
- **Brent  Gerken et al → Bluffton Stone Company:** 1989-07-11 through current/open; derived from co-tenure at mine 3300017; source `msha-controller-operator-history`.

- History rows: 3
- 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 — 1 since 2021:** Accidents and injuries 18 historical accident/injury rows; 0 coded fatalities and 89 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 163 violation rows across the full record; 36 carry an S&S flag and $26,327 appears in current assessed amounts.
3. **HEALTH — 58 samples:** Occupational health samples 58 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 9K employee hours and 18 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 4 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 — 13 since 2021:** Inspections 75 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 56.12004 — Electrical conductors.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.14101 — 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 56.14112 — 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 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
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 18 rows; 2000-05-19 through 2022-05-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2007-10-08 through 2007-10-08; source ID `msha-addresses`
- **Assessed Violations:** 162 rows; 2001-02-12 through 2026-05-06; source ID `msha-assessed-violations`
- **Conferences:** 4 rows; 2005-06-30 through 2005-07-28; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 601 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 139 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1989-07-11; source ID `msha-controller-operator-history`
- **Inspections:** 75 rows; 2000-01-10 through 2026-05-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 58 rows; 2001-02-13 through 2024-11-26; source ID `msha-personal-health-samples`
- **Violations:** 163 rows; 2001-02-12 through 2026-05-06; 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/bluffton-stone-company-llc-3300017`
- JSON: `/api/v1/mines/bluffton-stone-company-llc-3300017`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3300017/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3300017/relationships`
- MCP resource: `mine://3300017/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`