# Relationship history for MSHA mine 1514812

Current hierarchy: **Joseph Brothers Inc → Joseph Brothers Inc → No 20**

- 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:** Joseph Brothers Inc → No 20; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cornett Rudy → No 20; 1984-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & M Coal Company → No 20; 1984-08-01 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Little Leonard → No 20; 1984-08-01 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Little Leonard → L & M Coal Company; 1984-08-01 to 1985-02-20; source msha-controller-operator-history
- **operator_operates_mine:** R C Coal Company Inc → No 20; 1985-02-21 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Cornett Rudy → R C Coal Company Inc; 1985-02-21 to 1985-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Rose Marie Coal Company Inc → No 20; 1985-04-24 to 1985-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Rose Marie → No 20; 1985-04-24 to 1985-12-18; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Rose Marie → Rose Marie Coal Company Inc; 1985-04-24 to 1985-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Joseph Brothers Inc → No 20; 1985-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph Brothers Inc → Joseph Brothers Inc; 1985-12-19 to current/open; source msha-controller-operator-history