# Relationship history for MSHA mine 4404238

Current hierarchy: **Hornsby Edward → Jeri Mining Company Inc → No 1 Strip**

- 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

- **operator_operates_mine:** Mill Creek Mining Inc → No 1 Strip; 1975-12-01 to 1977-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Phillips Fred G → No 1 Strip; 1975-12-01 to 1977-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Fred G → Mill Creek Mining Inc; 1975-12-01 to 1977-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Jeri Mining Company Inc → No 1 Strip; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hornsby Edward → No 1 Strip; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hornsby Edward → Jeri Mining Company Inc; 1977-11-01 to current/open; source msha-controller-operator-history