# Relationship history for MSHA mine 4607225

Current hierarchy: **Ferrell Joe → Jovic Mining Company Inc → Coalburg Mine #1**

- 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:** Ferrell Joe → Coalburg Mine #1; 1986-03-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jovic Mining Company Inc → Coalburg Mine #1; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ferrell Joe → Jovic Mining Company Inc; 1986-11-01 to current/open; source msha-controller-operator-history