# Relationship history for MSHA mine 1519382

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Mt. Sterling Energy Mining → Phoenix**

- 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

- **controller_controls_mine:** Massey Energy Company → Phoenix; 1984-10-04 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Phoenix; 2004-10-27 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** ICG East Kentucky LLC → Phoenix; 2009-02-10 to 2011-04-19; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ICG East Kentucky LLC; 2009-02-10 to 2011-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Mt. Sterling Energy Mining → Phoenix; 2011-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Mt. Sterling Energy Mining; 2011-04-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Phoenix; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Mt. Sterling Energy Mining; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Phoenix; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ICG East Kentucky LLC; 2011-06-15 to 2011-04-19; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Phoenix; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Mt. Sterling Energy Mining; 2016-07-26 to current/open; source msha-controller-operator-history