# Relationship history for MSHA mine 4606870

Current hierarchy: **Lexington Coal Holdings, Inc → Lexington Coal Company, LLC → No 1 Surface**

- 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:** High Power Energy → No 1 Surface; 1984-12-01 to 1998-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Geupel Construction Co Inc  et al → No 1 Surface; 1984-12-01 to 1998-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Geupel Construction Co Inc  et al → High Power Energy; 1984-12-01 to 1998-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 1 Surface; 1997-10-20 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Alex Energy, LLC → No 1 Surface; 1998-10-26 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Alex Energy, LLC; 1998-10-26 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 1 Surface; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Alex Energy, LLC; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → No 1 Surface; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Alex Energy, LLC; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → No 1 Surface; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → No 1 Surface; 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 current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → No 1 Surface; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Alex Energy, LLC; 2018-11-09 to 2017-10-22; source msha-controller-operator-history