# Mockingbird Mine

- **MSHA mine ID:** 0405781
- **Status:** Abandoned
- **Type / commodity:** Underground / Gold Ore
- **Location:** Mariposa, CA
- **Operator:** Emmett's Excavation Inc
- **Controller:** John  Emmett; Lucretia  Emmett
- **Public source rows linked:** 268
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**John  Emmett; Lucretia  Emmett (0084453) → Emmett's Excavation Inc (0100045) → Mockingbird Mine (0405781)**

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

## Controller and operator valid-time history

- **Lucretia  Emmett et al → Emmett's Excavation Inc:** 2009-03-25 through current/open; derived from co-tenure at mine 0405781; source `msha-controller-operator-history`.
- **John  Emmett et al → Emmett's Excavation Inc:** 2009-03-25 through current/open; derived from co-tenure at mine 0405781; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 4
- 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 1 historical accident/injury rows; 0 coded fatalities and 1 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 31 violation rows across the full record; 5 carry an S&S flag and $3,921 appears in current assessed amounts.
3. **HEALTH — 17 samples:** Occupational health samples 17 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 688 employee hours and 4 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 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 — 0 since 2021:** Inspections 49 inspection events and 771 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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 57.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4402
- **30 CFR 57.13021 — High-pressure hose connections.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-L/section-57.13021
- **30 CFR 57.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-L/section-57.13015
- **30 CFR 57.18013 — Emergency communications system.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-Q/section-57.18013
- **30 CFR 57.20032 — Two-way communication equipment for underground operations.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-S/section-57.20032
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 57.6132 — Magazine requirements.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6132
- **30 CFR 57.6100 — Separation of stored explosive material.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-E/section-57.6100
- **30 CFR 57.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12028

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2014-11-12 through 2014-11-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2020-05-20 through 2020-05-20; source ID `msha-addresses`
- **Assessed Violations:** 31 rows; 2009-05-13 through 2020-03-04; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2011-05-03 through 2011-05-03; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 4 rows; 2009-05-13 through 2009-05-13; source ID `msha-contested-violations`
- **Controller and Operator History:** 2 rows; 2009-03-25 through 2009-03-25; source ID `msha-controller-operator-history`
- **Inspections:** 49 rows; 2009-05-13 through 2020-05-18; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 106 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 21 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:** 17 rows; 2011-02-02 through 2020-03-04; source ID `msha-personal-health-samples`
- **Violations:** 31 rows; 2009-05-13 through 2020-03-04; 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/mockingbird-mine-0405781`
- JSON: `/api/v1/mines/mockingbird-mine-0405781`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405781/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405781/relationships`
- MCP resource: `mine://0405781/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`