# Relationship history for MSHA mine 0102555

Current hierarchy: **Costain Group PLC → Energy Supply Inc → Crooked Creek Mine**

- 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:** Energy Supply Inc → Crooked Creek Mine; 1983-08-01 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Resources Inc → Crooked Creek Mine; 1983-08-01 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Resources Inc → Energy Supply Inc; 1983-08-01 to 1985-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Costain Group PLC → Crooked Creek Mine; 1985-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Energy Supply Inc → Crooked Creek Mine; 1985-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Costain Group PLC → Energy Supply Inc; 1985-04-24 to current/open; source msha-controller-operator-history