# Relationship history for MSHA mine 4406673

Current hierarchy: **Metinvest B V → Black Diamond Company → Industrial**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** United  Company → Industrial; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ellis  Baldwin → Industrial; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Southern Mining Co → Industrial; 1985-11-27 to 2006-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp → Industrial; 1991-09-01 to 1994-08-31; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Wellmore Coal Corp; 1991-09-01 to 1994-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Industrial Coal Corp → Industrial; 1994-09-01 to 2003-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Ellis  Baldwin → Industrial Coal Corp; 1994-09-01 to 2003-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Black Diamond Company → Industrial; 2003-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southern Mining Co → Black Diamond Company; 2003-10-22 to 2006-01-01; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Industrial; 2006-01-02 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Black Diamond Company; 2006-01-02 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Metinvest B V → Industrial; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metinvest B V → Black Diamond Company; 2009-04-30 to current/open; source msha-controller-operator-history