# Relationship history for MSHA mine 4606619

Current hierarchy: **Ferrell Joe → Jovic Mining Company Inc → Golden Bear 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Massey Energy Company → Golden Bear No 1; 1978-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robertson Jack → Golden Bear No 1; 1982-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Bear Mining Company Inc → Golden Bear No 1; 1982-09-01 to 1985-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Big Bear Mining Company Inc; 1982-09-01 to 1985-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Ro-Fer & Associates Inc → Golden Bear No 1; 1985-05-23 to 1986-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Robertson Jack → Ro-Fer & Associates Inc; 1985-05-23 to 1986-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Jovic Mining Company Inc → Golden Bear No 1; 1986-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ferrell Joe → Golden Bear No 1; 1986-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ferrell Joe → Jovic Mining Company Inc; 1986-03-21 to current/open; source msha-controller-operator-history