# Relationship history for MSHA mine 4406158

Current hierarchy: **Stephen D  Halsey; Carl A  Hamilton → Mountaineer Coal Company Inc → No 2 Mine**

- 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:** Big A Mountain Coal Corp → No 2 Mine; 1984-11-01 to 1985-10-14; source msha-controller-operator-history
- **controller_controls_mine:** Mc Glothlin James T → No 2 Mine; 1984-11-01 to 1985-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Glothlin James T → Big A Mountain Coal Corp; 1984-11-01 to 1985-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Redbud Coal Corp → No 2 Mine; 1985-10-15 to 1986-05-27; source msha-controller-operator-history
- **controller_controls_mine:** Gamble Mac → No 2 Mine; 1985-10-15 to 1986-05-27; source msha-controller-operator-history
- **controller_controls_operator:** Gamble Mac → Redbud Coal Corp; 1985-10-15 to 1986-05-27; source msha-controller-operator-history
- **controller_controls_mine:** Stephen D  Halsey et al → No 2 Mine; 1986-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountaineer Coal Company Inc → No 2 Mine; 1986-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen D  Halsey et al → Mountaineer Coal Company Inc; 1986-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl A  Hamilton et al → Mountaineer Coal Company Inc; 1986-05-28 to current/open; source msha-controller-operator-history