# Relationship history for MSHA mine 1102879

Current hierarchy: **Peabody Energy Corporation → Big Ridge Inc → Big Ridge Mine Prep Plant/Maint Shop**

- 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

- **operator_operates_mine:** Big Ridge Inc → Big Ridge Mine Prep Plant/Maint Shop; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel W  Bailey et al → Big Ridge Mine Prep Plant/Maint Shop; 2001-07-25 to 2002-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Daniel W  Bailey et al → Big Ridge Inc; 2001-07-25 to 2002-03-05; source msha-controller-operator-history
- **controller_controls_mine:** MDM HOLDING INCORPORATED → Big Ridge Mine Prep Plant/Maint Shop; 2002-03-06 to 2002-10-08; source msha-controller-operator-history
- **controller_controls_operator:** MDM HOLDING INCORPORATED → Big Ridge Inc; 2002-03-06 to 2002-10-08; source msha-controller-operator-history
- **controller_controls_mine:** Peabody Energy Corporation → Big Ridge Mine Prep Plant/Maint Shop; 2002-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peabody Energy Corporation → Big Ridge Inc; 2002-10-09 to current/open; source msha-controller-operator-history