# Relationship history for MSHA mine 4606889

Current hierarchy: **Donald  Nicewonder → Premium Energy Inc → Ben Creek Preparation Plant**

- 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:** Mingo Logan Coal Company → Ben Creek Preparation Plant; 1985-02-01 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_mine:** British Petroleum Company PLC → Ben Creek Preparation Plant; 1985-02-01 to 1990-01-23; source msha-controller-operator-history
- **controller_controls_operator:** British Petroleum Company PLC → Mingo Logan Coal Company; 1985-02-01 to 1989-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Nicewonder → Ben Creek Preparation Plant; 1988-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premium Energy Inc → Ben Creek Preparation Plant; 1989-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Nicewonder → Premium Energy Inc; 1989-06-15 to current/open; source msha-controller-operator-history