# Alpine Silica-Kermit

- **MSHA mine ID:** 4105309
- **Status:** Active
- **Type / commodity:** Surface / Sand, Common
- **Location:** Winkler, TX
- **Operator:** Alpine Silica, LLC
- **Controller:** Pro Frac Holding Corp
- **Public source rows linked:** 665
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Pro Frac Holding Corp (0171280) → Alpine Silica, LLC (0154314) → Alpine Silica-Kermit (4105309)**

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

## Controller and operator valid-time history

- **Wilks Brothers LLC → Alpine Silica, LLC:** 2017-11-13 through 2022-10-09; derived from co-tenure at mine 4105309; source `msha-controller-operator-history`.
- **Pro Frac Holding Corp → Alpine Silica, LLC:** 2022-10-10 through current/open; derived from co-tenure at mine 4105309; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 5
- 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 — 3 since 2021:** Accidents and injuries 8 historical accident/injury rows; 0 coded fatalities and 543 lost days across the published record.
2. **COMPLIANCE — 112 since 2021:** Violations and penalties 173 violation rows across the full record; 47 carry an S&S flag and $102,884 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 13 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 20K employee hours and 34 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 23 since 2021:** Inspections 38 inspection events and 974 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 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **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 56.12008 — Insulation and fittings for power wires and cables.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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
- **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 56.12030 — 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 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2018-03-03 through 2026-02-16; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2018-10-01 through 2018-10-01; source ID `msha-addresses`
- **Assessed Violations:** 173 rows; 2018-07-18 through 2026-05-14; source ID `msha-assessed-violations`
- **Conferences:** 2 rows; 2025-08-07 through 2025-08-07; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 139 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 33 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2017-11-13 through 2017-11-13; source ID `msha-controller-operator-history`
- **Inspections:** 38 rows; 2017-12-11 through 2026-06-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 64 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 18 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:** 13 rows; 2019-09-25 through 2025-07-15; source ID `msha-personal-health-samples`
- **Violations:** 173 rows; 2018-07-18 through 2026-05-14; 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/alpine-silica-kermit-4105309`
- JSON: `/api/v1/mines/alpine-silica-kermit-4105309`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4105309/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4105309/relationships`
- MCP resource: `mine://4105309/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`