# Relationship history for MSHA mine 2901879

Current hierarchy: **Peabody Energy Corporation → Peabody Natural Resources Company → Lee Ranch Coal 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:** Santa Fe Pacific Coal Corp → Lee Ranch Coal Mine; 1982-02-01 to 1993-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Santa Fe Southern Pacific Corp → Lee Ranch Coal Mine; 1982-02-01 to 1993-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Santa Fe Southern Pacific Corp → Santa Fe Pacific Coal Corp; 1982-02-01 to 1993-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Lee Ranch Coal Company → Lee Ranch Coal Mine; 1993-06-26 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Lee Ranch Coal Mine; 1993-06-26 to 1998-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Lee Ranch Coal Company; 1993-06-26 to 1998-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Peabody Natural Resources Company → Lee Ranch Coal Mine; 1998-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Lee Ranch Coal Mine; 1998-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Peabody Natural Resources Company; 1998-05-19 to current/open; source msha-controller-operator-history