# Relationship history for MSHA mine 1518331

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Coalgood Energy Co → Coalgood Crusher/Loadout**

- 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:** Goddess Coal Corp LLC → Coalgood Crusher/Loadout; 1996-06-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New Horizons Coal Inc → Coalgood Crusher/Loadout; 2001-02-01 to 2005-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Goddess Coal Corp LLC → New Horizons Coal Inc; 2001-02-01 to 2005-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Coalgood Energy Co → Coalgood Crusher/Loadout; 2005-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Coalgood Crusher/Loadout; 2005-08-09 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Coalgood Energy Co; 2005-08-09 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Coalgood Crusher/Loadout; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Coalgood Energy Co; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Coalgood Crusher/Loadout; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Coalgood Energy Co; 2016-07-26 to current/open; source msha-controller-operator-history