# Relationship history for MSHA mine 0100833

Current hierarchy: **Pyro Energy Corp → King Coal Company Inc → Sipsey Pit**

- 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:** Bishop Coal Company Inc → Sipsey Pit; 1950-01-01 to 1975-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Bishop Coal Company Inc → Sipsey Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bishop Coal Company Inc → Bishop Coal Company Inc; 1950-01-01 to 1975-08-04; source msha-controller-operator-history
- **controller_controls_mine:** Raines Charles H → Sipsey Pit; 1950-01-01 to 1976-05-12; source msha-controller-operator-history
- **operator_operates_mine:** King Coal Company Inc → Sipsey Pit; 1975-08-05 to 1976-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Raines Charles H → King Coal Company Inc; 1975-08-05 to 1976-05-12; source msha-controller-operator-history
- **operator_operates_mine:** King Coal Company Inc → Sipsey Pit; 1976-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pyro Energy Corp → Sipsey Pit; 1976-05-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pyro Energy Corp → King Coal Company Inc; 1976-05-13 to current/open; source msha-controller-operator-history