# Relationship history for MSHA mine 1517800

Current hierarchy: **Patriot Coal Corporation → Grand Eagle Mining Inc → Big Run**

- 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:** Peabody Energy Corporation → Big Run; 1995-04-18 to 2007-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Grand Eagle Mining Inc → Big Run; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Grand Eagle Mining Inc; 1996-05-01 to 2007-10-30; source msha-controller-operator-history
- **controller_controls_mine:** Patriot Coal Corporation → Big Run; 2007-10-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patriot Coal Corporation → Grand Eagle Mining Inc; 2007-10-31 to current/open; source msha-controller-operator-history