# Relationship history for MSHA mine 4400238

Current hierarchy: **CONSOL Energy Inc → Beatrice Pocahontas Company → Beatrice**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Beatrice Pocahontas Company → Beatrice; 1950-01-01 to 1993-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Island Creek Coal Co & Ltv Steel Company Inc → Beatrice; 1950-01-01 to 1993-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Island Creek Coal Co & Ltv Steel Company Inc → Beatrice Pocahontas Company; 1950-01-01 to 1993-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Beatrice Pocahontas Company → Beatrice; 1993-01-21 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → Beatrice; 1993-01-21 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → Beatrice Pocahontas Company; 1993-01-21 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Beatrice Pocahontas Company → Beatrice; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Beatrice; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Beatrice Pocahontas Company; 1993-07-01 to current/open; source msha-controller-operator-history