# Relationship history for MSHA mine 4605980

Current hierarchy: **Nead Robert → Phantom Coal Inc → Phantom 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:** Shoshone Mining Company Inc → Phantom No 1; 1978-10-01 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Warf Jack D → Phantom No 1; 1978-10-01 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Warf Jack D → Shoshone Mining Company Inc; 1978-10-01 to 1983-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Phantom Coal Inc → Phantom No 1; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nead Robert → Phantom No 1; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nead Robert → Phantom Coal Inc; 1983-08-26 to current/open; source msha-controller-operator-history