# Relationship history for MSHA mine 4608838

Current hierarchy: **John Mitch Potter → Coal Mac, LLC → Superior Surface Mine**

- 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:** Donald  Nicewonder → Superior Surface Mine; 1988-02-01 to 2005-11-01; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Superior Surface Mine; 1989-10-19 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Superior Surface Mine; 1993-01-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Superior Surface Mine; 1997-07-01 to 2019-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Superior Surface Mine; 1997-10-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Superior Surface Mine; 1998-05-07 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Road Fork Development Company → Superior Surface Mine; 2000-07-01 to 2004-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Road Fork Development Company; 2000-07-01 to 2004-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Alex Energy Inc → Superior Surface Mine; 2004-02-24 to 2012-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Alex Energy Inc; 2004-02-24 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Superior Surface Mine; 2005-11-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Superior Surface Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Road Fork Development Company; 2011-06-01 to 2004-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Alex Energy Inc; 2011-06-01 to 2012-01-09; source msha-controller-operator-history
- **operator_operates_mine:** White Flame Energy Inc → Superior Surface Mine; 2012-01-10 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → White Flame Energy Inc; 2012-01-10 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Nicewonder → White Flame Energy Inc; 2012-01-10 to 2005-11-01; source msha-controller-operator-history
- **operator_operates_mine:** Highland Mining Company → Superior Surface Mine; 2014-01-01 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Highland Mining Company; 2014-01-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Highland Mining Company; 2014-01-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Superior Surface Mine; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Road Fork Development Company; 2016-07-26 to 2004-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Alex Energy Inc; 2016-07-26 to 2012-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Highland Mining Company; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → Superior Surface Mine; 2017-10-23 to 2024-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → Superior Surface Mine; 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 2024-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Superior Surface Mine; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Road Fork Development Company; 2018-11-09 to 2004-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Alex Energy Inc; 2018-11-09 to 2012-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Highland Mining Company; 2018-11-09 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_mine:** John Mitch Potter → Superior Surface Mine; 2019-10-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Mac, LLC → Superior Surface Mine; 2024-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Mitch Potter → Coal Mac, LLC; 2024-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Coal Mac, LLC; 2024-07-23 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Coal Mac, LLC; 2024-07-23 to 2019-10-22; source msha-controller-operator-history