# HC Augusta LLC

- **MSHA mine ID:** 4703642
- **Status:** Abandoned
- **Type / commodity:** Surface / Sand, Industrial NEC
- **Location:** Eau Claire, WI
- **Operator:** HC Augusta LLC
- **Controller:** Iron Oak Energy Solutions LLC
- **Public source rows linked:** 497
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Iron Oak Energy Solutions LLC (0189021) → HC Augusta LLC (0118489) → HC Augusta LLC (4703642)**

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

## Controller and operator valid-time history

- **Hi-Crush Proppants LLC → HC Augusta LLC:** 2012-04-02 through 2012-08-22; derived from co-tenure at mine 4703642; source `msha-controller-operator-history`.
- **Hi-Crush Inc → HC Augusta LLC:** 2012-08-23 through 2024-08-04; derived from co-tenure at mine 4703642; source `msha-controller-operator-history`.
- **HC Minerals Inc → HC Augusta LLC:** 2024-08-05 through 2025-08-10; derived from co-tenure at mine 4703642; source `msha-controller-operator-history`.
- **Iron Oak Energy Solutions LLC → HC Augusta LLC:** 2025-08-11 through current/open; derived from co-tenure at mine 4703642; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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 20 historical accident/injury rows; 0 coded fatalities and 249 lost days across the published record.
2. **COMPLIANCE — 2 since 2021:** Violations and penalties 51 violation rows across the full record; 14 carry an S&S flag and $10,504 appears in current assessed amounts.
3. **HEALTH — 37 samples:** Occupational health samples 37 personal. 13 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 12 linked rows:** Contests, conferences and decisions 4 contested-violation rows, 4 civil-penalty docket/decision rows, and 4 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 — 6 since 2021:** Inspections 30 inspection events and 699 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 56.12032 — 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 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 56.20003 — Housekeeping.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 56.14201 — Conveyor start-up warnings.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14201
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **30 CFR 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 56.5001 — Exposure limits for airborne contaminants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **30 CFR 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 20 rows; 2012-11-20 through 2018-12-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2023-07-24 through 2023-07-24; source ID `msha-addresses`
- **Assessed Violations:** 51 rows; 2013-03-04 through 2021-09-14; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2016-07-01 through 2019-03-07; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2014-02-28 through 2022-01-20; source ID `msha-conferences`
- **Contested Violations:** 4 rows; 2015-03-17 through 2018-04-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 166 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 32 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2012-04-02 through 2012-04-02; source ID `msha-controller-operator-history`
- **Inspections:** 30 rows; 2012-07-02 through 2022-10-20; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 71 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:** 37 rows; 2013-03-06 through 2018-09-26; source ID `msha-personal-health-samples`
- **Violations:** 51 rows; 2013-03-04 through 2021-09-14; 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/hc-augusta-llc-4703642`
- JSON: `/api/v1/mines/hc-augusta-llc-4703642`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4703642/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4703642/relationships`
- MCP resource: `mine://4703642/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`