# Relationship history for MSHA mine 0102438

Current hierarchy: **Costain Group PLC → Mc Collum Coal Company Inc → Wolf Mountain**

- 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:** Mc Collum Coal Company Inc → Wolf Mountain; 1982-02-01 to 1984-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Raines Charles H → Wolf Mountain; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raines Charles H → Mc Collum Coal Company Inc; 1982-02-01 to 1984-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Mc Collum Coal Company Inc → Wolf Mountain; 1984-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Costain Group PLC → Wolf Mountain; 1984-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Mc Collum Coal Company Inc; 1984-08-21 to current/open; source msha-controller-operator-history