# Relationship history for MSHA mine 4602515

Current hierarchy: **John Mitch Potter → Coal-Mac, LLC → Superior Preparation 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** W-P Coal Company → Superior Preparation Plant; 1950-01-01 to 1993-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Wheeling-Pittsburgh Corp → Superior Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wheeling-Pittsburgh Corp → W-P Coal Company; 1950-01-01 to 1993-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Superior Preparation Plant; 1989-10-19 to 1997-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Stirrat Coal Company → Superior Preparation Plant; 1993-11-15 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Superior Preparation Plant; 1993-11-15 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Stirrat Coal Company; 1993-11-15 to 1994-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Augusta Processing Inc → Superior Preparation Plant; 1994-02-22 to 1997-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Joby  Fields → Superior Preparation Plant; 1994-02-22 to 1997-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Joby  Fields → Augusta Processing Inc; 1994-02-22 to 1997-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Stirrat Coal Company LLC → Superior Preparation Plant; 1997-01-20 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Stirrat Coal Company LLC; 1997-01-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Superior Preparation Plant; 1997-07-01 to 2019-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Superior Preparation Plant; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Stirrat Coal Company; 2011-06-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Stirrat Coal Company LLC; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Superior Preparation Plant; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Stirrat Coal Company; 2016-07-26 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Stirrat Coal Company LLC; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → Superior Preparation Plant; 2017-10-23 to 2024-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → Superior Preparation Plant; 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:** John Mitch Potter → Superior Preparation Plant; 2019-10-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal-Mac, LLC → Superior Preparation Plant; 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