# Calera

- **MSHA mine ID:** 0103380
- **Status:** Abandoned
- **Type / commodity:** Facility / Coal (Bituminous)
- **Location:** Shelby, AL
- **Operator:** Conrad Yelvington Distributors
- **Controller:** CRH PLC
- **Public source rows linked:** 585
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Conrad Yelvington Distributors (0051492) → Calera (0103380)**

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

## Controller and operator valid-time history

- **CRH PLC → Conrad Yelvington Dist.:** 2008-02-01 through 2012-03-12; derived from co-tenure at mine 0103380; source `msha-controller-operator-history`.
- **Ashland Inc → Conrad Yelvington Distributors:** 2012-03-13 through 2006-08-27; derived from co-tenure at mine 0103380; source `msha-controller-operator-history`.
- **CRH PLC → Conrad Yelvington Distributors:** 2012-03-13 through current/open; derived from co-tenure at mine 0103380; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- Interval anomalies: 1
- 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 3 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 6 since 2021:** Violations and penalties 26 violation rows across the full record; 1 carry an S&S flag and $3,036 appears in current assessed amounts.
3. **HEALTH — 279 samples:** Occupational health samples 175 coal dust; 104 noise. 0 personal-sample rows have a published C/E ratio above 1; 7 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 5K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 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 — 14 since 2021:** Inspections 56 inspection events and 904 published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 0 short tons
- **Labor hours:** 25,030
- **Average employees:** 12
- **Coal supply region:** Appalachia Southern
- **Union code:** Not published
- **Published rows under this MSHA ID:** 2

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.410 — Mobile equipment; automatic warning devices.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410
- **30 CFR 48.23 — Training plans; time of submission; where filed; information required; time for approval; method for disapproval; commencement of training; approval of instructors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.23
- **30 CFR 62.130 — Permissible exposure level.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.130
- **30 CFR 72.100 — Periodic examinations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-72/subpart-B/section-72.100
- **30 CFR 77.505 — Cable fittings; suitability.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.505
- **30 CFR 77.1104 — Accumulations of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.1713 — Daily inspection of surface coal mine; certified person; reports of inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-R/section-77.1713
- **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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2009-01-30 through 2015-01-06; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-07-27 through 2026-07-27; source ID `msha-addresses`
- **Assessed Violations:** 26 rows; 2008-07-01 through 2026-03-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2013-02-26 through 2013-02-26; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 175 rows; 2008-03-13 through 2025-07-23; source ID `msha-coal-dust-samples`
- **Contested Violations:** 2 rows; 2012-02-22 through 2012-02-22; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 2008-02-01 through 2012-03-13; source ID `msha-controller-operator-history`
- **Inspections:** 56 rows; 2008-03-13 through 2026-07-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 148 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 38 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 104 rows; 2008-03-13 through 2025-07-23; source ID `msha-noise-samples`
- **Violations:** 26 rows; 2008-07-01 through 2026-03-05; 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/calera-0103380`
- JSON: `/api/v1/mines/calera-0103380`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0103380/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0103380/relationships`
- MCP resource: `mine://0103380/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`