# Relationship history for MSHA mine 4604782

Current hierarchy: **Robinson Rodney → Robinson Coal Company Inc → Pal #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:** Elmore Robert → Pal #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Jacket Coal Company Inc → Pal #1; 1975-10-09 to 1977-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Elmore Robert → Red Jacket Coal Company Inc; 1975-10-09 to 1977-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer-Harrison Mining Company Inc → Pal #1; 1977-03-22 to 1979-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Hurn Franklin M & Raymond A Smego → Pal #1; 1977-03-22 to 1979-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Hurn Franklin M & Raymond A Smego → Pioneer-Harrison Mining Company Inc; 1977-03-22 to 1979-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Mitchell Energy Corp → Pal #1; 1979-12-21 to 1983-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Iverson → Pal #1; 1979-12-21 to 1983-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Iverson → Mitchell Energy Corp; 1979-12-21 to 1983-02-15; source msha-controller-operator-history
- **operator_operates_mine:** P A L Coal Inc → Pal #1; 1983-02-16 to 1984-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Ferguson Thad → Pal #1; 1983-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ferguson Thad → P A L Coal Inc; 1983-02-16 to 1984-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Robinson Coal Company Inc → Pal #1; 1984-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robinson Rodney → Pal #1; 1984-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robinson Rodney → Robinson Coal Company Inc; 1984-04-05 to current/open; source msha-controller-operator-history