# Relationship history for MSHA mine 4604693

Current hierarchy: **Angela  Hopkins → Bearco Mining Company Inc → Mine No 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:** Mary Lynn Coal Company Inc → Mine No 1; 1975-07-15 to 1976-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Brant Ray S → Mine No 1; 1975-07-15 to 1976-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Brant Ray S → Mary Lynn Coal Company Inc; 1975-07-15 to 1976-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine No 1; 1975-08-15 to 1978-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Rose Branch Development Company → Mine No 1; 1976-08-17 to 1978-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Rose Branch Development Company; 1976-08-17 to 1978-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Rose Branch Development Company → Mine No 1; 1978-03-22 to 1994-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Voest-Alpine International Corp → Mine No 1; 1978-03-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Voest-Alpine International Corp → Rose Branch Development Company; 1978-03-22 to 1994-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Cline Frank → Mine No 1; 1994-01-03 to 1997-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Lumbar Inc → Mine No 1; 1994-06-01 to 1997-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Cline Frank → Lumbar Inc; 1994-06-01 to 1997-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Bearco Mining Company Inc → Mine No 1; 1997-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angela  Hopkins → Mine No 1; 1997-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angela  Hopkins → Bearco Mining Company Inc; 1997-07-28 to current/open; source msha-controller-operator-history