# Relationship history for MSHA mine 0200533

Current hierarchy: **Peabody Energy Corporation → Peabody Western Coal Company → Black Mesa Mine**

- 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:** Peabody Coal Company → Black Mesa Mine; 1950-01-01 to 1977-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Kennecott Copper Corp → Black Mesa Mine; 1950-01-01 to 1977-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kennecott Copper Corp → Peabody Coal Company; 1950-01-01 to 1977-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Peabody Western Coal Company → Black Mesa Mine; 1977-07-01 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Black Mesa Mine; 1977-07-01 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Peabody Western Coal Company; 1977-07-01 to 1998-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Peabody Western Coal Company → Black Mesa Mine; 1998-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Black Mesa Mine; 1998-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Peabody Western Coal Company; 1998-05-19 to current/open; source msha-controller-operator-history