# Relationship history for MSHA mine 1518466

Current hierarchy: **Ferroglobe PLC → Ferroglobe USA Mining, LLC → Alden Resources Harps Creek**

- 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

- **controller_controls_mine:** Robert M  Keen → Alden Resources Harps Creek; 1995-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** F-M Coal Corp → Alden Resources Harps Creek; 2001-10-18 to 2017-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Robert M  Keen → F-M Coal Corp; 2001-10-18 to 2017-07-04; source msha-controller-operator-history
- **controller_controls_mine:** James  Cox et al → Alden Resources Harps Creek; 2007-03-30 to 2009-07-16; source msha-controller-operator-history
- **controller_controls_mine:** NCGPAsset Holdings II LP et al → Alden Resources Harps Creek; 2009-07-17 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Ferroglobe PLC → Alden Resources Harps Creek; 2011-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maverick Construction Inc → Alden Resources Harps Creek; 2017-07-05 to 2018-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Steven T  Ratliff → Alden Resources Harps Creek; 2017-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven T  Ratliff → Maverick Construction Inc; 2017-07-05 to 2018-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Ferroglobe USA Mining, LLC → Alden Resources Harps Creek; 2018-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Cox et al → Ferroglobe USA Mining, LLC; 2018-08-06 to 2009-07-16; source msha-controller-operator-history
- **controller_controls_operator:** NCGPAsset Holdings II LP et al → Ferroglobe USA Mining, LLC; 2018-08-06 to 2011-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Ferroglobe PLC → Ferroglobe USA Mining, LLC; 2018-08-06 to current/open; source msha-controller-operator-history