# Stone Del Milagro

- **MSHA mine ID:** 4104632
- **Status:** Abandoned
- **Type / commodity:** Surface / Dimension Limestone
- **Location:** El Paso, TX
- **Operator:** Rockwall Material Center, LLC.
- **Controller:** Liborio  Garcia; Sergio  Mata
- **Public source rows linked:** 390
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Liborio  Garcia; Sergio  Mata (0064769) → Rockwall Material Center, LLC. (0077084) → Stone Del Milagro (4104632)**

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

## Controller and operator valid-time history

- **Sergio  Mata et al → Rockwall Material Center, LLC.:** 2006-12-07 through current/open; derived from co-tenure at mine 4104632; source `msha-controller-operator-history`.
- **Liborio  Garcia et al → Rockwall Material Center, LLC.:** 2006-12-07 through current/open; derived from co-tenure at mine 4104632; 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 113 violation rows across the full record; 36 carry an S&S flag and $22,634 appears in current assessed amounts.
3. **HEALTH — 8 samples:** Occupational health samples 8 personal. 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 480 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 — 0 since 2021:** Inspections 50 inspection events and 493 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 56.18010 — First aid.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18010
- **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
- **30 CFR 56.14132 — Horns and backup alarms.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.18002 — 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 56.4201 — 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 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100

## Source coverage

- **Addresses of Record:** 1 rows; 2020-08-14 through 2020-08-14; source ID `msha-addresses`
- **Assessed Violations:** 105 rows; 2007-04-04 through 2019-09-11; source ID `msha-assessed-violations`
- **Controller and Operator History:** 2 rows; 2006-12-07 through 2006-12-07; source ID `msha-controller-operator-history`
- **Inspections:** 50 rows; 2007-03-14 through 2020-03-09; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 97 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`
- **Metal and Nonmetal Personal Health Samples:** 8 rows; 2007-07-11 through 2010-04-28; source ID `msha-personal-health-samples`
- **Violations:** 113 rows; 2007-04-04 through 2019-10-21; 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/stone-del-milagro-4104632`
- JSON: `/api/v1/mines/stone-del-milagro-4104632`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4104632/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4104632/relationships`
- MCP resource: `mine://4104632/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`