# Relationship history for MSHA mine 4607075

Current hierarchy: **Stephen D  Halsey; Carl A  Hamilton → Wolverine Coal Company Inc → Hickorylick No 4c**

- 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:** A F Budge Mining Ltd → Hickorylick No 4c; 1985-03-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Resources Inc → Hickorylick No 4c; 1986-01-01 to 1986-04-14; source msha-controller-operator-history
- **controller_controls_operator:** A F Budge Mining Ltd → Phoenix Resources Inc; 1986-01-01 to 1986-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Adkins Brothers Corp → Hickorylick No 4c; 1986-04-15 to 1986-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Adkins William Gary → Hickorylick No 4c; 1986-04-15 to 1987-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Adkins William Gary → Adkins Brothers Corp; 1986-04-15 to 1986-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Wolverine Coal Company Inc → Hickorylick No 4c; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl A  Hamilton et al → Hickorylick No 4c; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl A  Hamilton et al → Wolverine Coal Company Inc; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen D  Halsey et al → Wolverine Coal Company Inc; 1986-12-01 to current/open; source msha-controller-operator-history