# Relationship history for MSHA mine 1001984

Current hierarchy: **Clint  Matkin; Billy  Matkin → Matkin Brothers Excavation Inc → Matkin Pit**

- 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:** Matkin Excavation Inc → Matkin Pit; 2000-07-01 to 2006-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Matkin → Matkin Pit; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Matkin → Matkin Excavation Inc; 2000-07-01 to 2006-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Matkin Brothers Excavation Inc → Matkin Pit; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Billy  Matkin et al → Matkin Pit; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy  Matkin et al → Matkin Brothers Excavation Inc; 2006-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clint  Matkin et al → Matkin Brothers Excavation Inc; 2006-05-01 to current/open; source msha-controller-operator-history