# Relationship history for MSHA mine 4406531

Current hierarchy: **Metinvest B V → Kentar Energy Company → Mine No 4**

- 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

- **controller_controls_mine:** Layne Earnest → Mine No 4; 1974-10-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Bear Coal Corp → Mine No 4; 1989-08-01 to 1998-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Layne Earnest → Black Bear Coal Corp; 1989-08-01 to 1998-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Stacy → Mine No 4; 1998-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp → Mine No 4; 1998-11-10 to 2003-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Wellmore Coal Corp; 1998-11-10 to 2003-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Stacy → Mine No 4; 2000-05-09 to 2006-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Kentar Energy Company → Mine No 4; 2003-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Kentar Energy Company; 2003-03-25 to 2006-03-22; source msha-controller-operator-history
- **controller_controls_mine:** United  Company → Mine No 4; 2006-03-23 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Kentar Energy Company; 2006-03-23 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Metinvest B V → Mine No 4; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Metinvest B V → Kentar Energy Company; 2009-04-30 to current/open; source msha-controller-operator-history