# Relationship history for MSHA mine 4607545

Current hierarchy: **Bobby  Justus → Monument Mining, Inc. → Coon Knob Surface 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Premium Energy Inc → Coon Knob Surface Mine; 1988-06-01 to 2005-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Donald  Nicewonder → Coon Knob Surface Mine; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Nicewonder → Premium Energy Inc; 1988-06-01 to 2005-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Premium Energy LLC → Coon Knob Surface Mine; 2005-11-02 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Coon Knob Surface Mine; 2005-11-02 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Premium Energy LLC; 2005-11-02 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Coon Knob Surface Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Premium Energy LLC; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Justus → Coon Knob Surface Mine; 2016-12-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → Coon Knob Surface Mine; 2017-10-23 to 2026-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → Coon Knob Surface Mine; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Holdings, Inc → Lexington Coal Company, LLC; 2017-10-23 to 2026-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Monument Mining, Inc. → Coon Knob Surface Mine; 2026-09-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Justus → Monument Mining, Inc.; 2026-09-18 to current/open; source msha-controller-operator-history