# Zerbe 10 Mine

- **MSHA mine ID:** 3609231
- **Status:** Active
- **Type / commodity:** Surface / Coal (Anthracite)
- **Location:** Northumberland, PA
- **Operator:** Fox Coal Company Inc.
- **Controller:** Vincent  Guarna; Michael  Guarna
- **Public source rows linked:** 316
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vincent  Guarna; Michael  Guarna (C11598) → Fox Coal Company Inc. (0075805) → Zerbe 10 Mine (3609231)**

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

## Controller and operator valid-time history

- **Joseph  Kleeman  et al → Mid-Valley Coal Sales Inc.:** 2004-04-25 through 2007-11-14; derived from co-tenure at mine 3609231; source `msha-controller-operator-history`.
- **Michael  Guarna et al → Fox Coal Company Inc.:** 2007-11-15 through current/open; derived from co-tenure at mine 3609231; source `msha-controller-operator-history`.
- **Vincent  Guarna et al → Fox Coal Company Inc.:** 2007-11-15 through current/open; derived from co-tenure at mine 3609231; source `msha-controller-operator-history`.
- **Vincent  Guarna et al → Mid-Valley Coal Sales Inc.:** 2013-09-17 through 2007-11-14; derived from co-tenure at mine 3609231; source `msha-controller-operator-history`.
- **Michael  Guarna et al → Mid-Valley Coal Sales Inc.:** 2013-09-17 through 2007-11-14; derived from co-tenure at mine 3609231; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 10
- Interval anomalies: 2
- 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 — 13 since 2021:** Violations and penalties 42 violation rows across the full record; 11 carry an S&S flag and $5,053 appears in current assessed amounts.
3. **HEALTH — 117 samples:** Occupational health samples 71 coal dust; 3 coal quartz; 43 noise. 0 personal-sample rows have a published C/E ratio above 1; 1 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 — 1K tons:** Quarterly production and employment 730 employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 — 15 since 2021:** Inspections 39 inspection events and 1K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 5,514 short tons
- **Labor hours:** 5,259
- **Average employees:** 3
- **Coal supply region:** Appalachia Northern
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.410 — Mobile equipment; automatic warning devices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410
- **30 CFR 71.400 — Bathing facilities; change rooms; sanitary flush toilet facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-E/section-71.400
- **30 CFR 71.209 — Status change reports.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-C/section-71.209
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1110 — Examination and maintenance of firefighting equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110
- **30 CFR 71.206 — Quarterly sampling; designated work positions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-71/subpart-C/section-71.206
- **30 CFR 77.1109 — Quantity and location of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1109
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 77.1102 — Warning signs; smoking and open flame.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1102
- **30 CFR 77.205 — Travelways at surface installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.205

## Source coverage

- **Addresses of Record:** 1 rows; 2023-04-06 through 2023-04-06; source ID `msha-addresses`
- **Assessed Violations:** 42 rows; 2008-09-24 through 2026-03-25; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 71 rows; 2008-09-25 through 2026-08-11; source ID `msha-coal-dust-samples`
- **Controller and Operator History:** 5 rows; 2004-04-25 through 2007-11-15; source ID `msha-controller-operator-history`
- **Inspections:** 39 rows; 2005-06-23 through 2026-07-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 56 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 13 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 43 rows; 2008-09-25 through 2026-03-25; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 3 rows; 2016-11-14 through 2018-11-14; source ID `msha-quartz-samples`
- **Violations:** 42 rows; 2008-09-24 through 2026-03-25; 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/zerbe-10-mine-3609231`
- JSON: `/api/v1/mines/zerbe-10-mine-3609231`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3609231/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3609231/relationships`
- MCP resource: `mine://3609231/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`