# Relationship history for MSHA mine 4601659

Current hierarchy: **Beard Frank N → Little Oak Energy Inc → Angus (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

- **operator_operates_mine:** Robinson-Phillips Coal Company Inc → Angus (1); 1950-01-01 to 1978-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Angus (1); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Robinson-Phillips Coal Company Inc; 1950-01-01 to 1978-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Angus Mining Company Inc → Angus (1); 1978-02-15 to 1988-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Jones David C → Angus (1); 1978-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones David C → Angus Mining Company Inc; 1978-02-15 to 1988-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Lewis E  Addair et al → Angus (1); 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burke Mountain Trucking Company Inc → Angus (1); 1988-08-22 to 1990-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Lewis E  Addair et al → Burke Mountain Trucking Company Inc; 1988-08-22 to 1990-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Larry A  Lough et al → Burke Mountain Trucking Company Inc; 1988-08-22 to 1990-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Coal Inc → Angus (1); 1990-10-23 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Collis Joshua → Angus (1); 1990-10-23 to 1992-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Collis Joshua → Falcon Coal Inc; 1990-10-23 to 1992-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Two B Coal Inc → Angus (1); 1992-10-01 to 1993-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Wright Chester → Angus (1); 1992-10-01 to 1993-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Wright Chester → Two B Coal Inc; 1992-10-01 to 1993-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Rayco Mining Inc → Angus (1); 1993-03-11 to 1993-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Raymond E  Hagerman → Angus (1); 1993-03-11 to 1996-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Raymond E  Hagerman → Rayco Mining Inc; 1993-03-11 to 1993-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Little Oak Energy Inc → Angus (1); 1993-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Beard Frank N → Angus (1); 1993-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beard Frank N → Little Oak Energy Inc; 1993-06-07 to current/open; source msha-controller-operator-history