# Relationship history for MSHA mine 4609125

Current hierarchy: **Haghler LLC → Greenbrier Smokeless Coal Mining LLC → Mountaineer Pocahontas No 1 Prep 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Greenbrier Smokeless Coal Mining, LLC → Mountaineer Pocahontas No 1 Prep Plant; 2005-12-15 to 2007-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Joseph C  Turley III et al → Mountaineer Pocahontas No 1 Prep Plant; 2005-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph C  Turley III et al → Greenbrier Smokeless Coal Mining, LLC; 2005-12-15 to 2007-01-31; source msha-controller-operator-history
- **controller_controls_mine:** John B  Preece → Mountaineer Pocahontas No 1 Prep Plant; 2007-01-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Virginia Mine Power, Inc → Mountaineer Pocahontas No 1 Prep Plant; 2007-02-01 to 2013-07-31; source msha-controller-operator-history
- **controller_controls_operator:** John B  Preece → West Virginia Mine Power, Inc; 2007-02-01 to 2013-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Greenbrier Minerals LLC → Mountaineer Pocahontas No 1 Prep Plant; 2013-08-01 to 2025-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Coronado Coal LLC → Mountaineer Pocahontas No 1 Prep Plant; 2013-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coronado Coal LLC → Greenbrier Minerals LLC; 2013-08-01 to 2025-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Greenbrier Smokeless Coal Mining LLC → Mountaineer Pocahontas No 1 Prep Plant; 2025-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Haghler LLC → Mountaineer Pocahontas No 1 Prep Plant; 2025-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haghler LLC → Greenbrier Smokeless Coal Mining LLC; 2025-01-21 to current/open; source msha-controller-operator-history