# Relationship history for MSHA mine 1519291

Current hierarchy: **John Mitch Potter → Coal-Mac LLC → SHM-20 MINER**

- 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:** Ashland Inc et al → SHM-20 MINER; 1989-10-19 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → SHM-20 MINER; 1997-07-01 to 2019-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Cardinal Mining LLC → SHM-20 MINER; 2008-08-12 to 2023-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Lonnie E  Rice → SHM-20 MINER; 2008-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie E  Rice → Cardinal Mining LLC; 2008-08-12 to 2023-02-14; source msha-controller-operator-history
- **controller_controls_mine:** John T  Quintrell → SHM-20 MINER; 2019-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John Mitch Potter → SHM-20 MINER; 2019-10-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Civil, LLC → SHM-20 MINER; 2023-02-15 to 2025-03-19; source msha-controller-operator-history
- **controller_controls_operator:** John T  Quintrell → Civil, LLC; 2023-02-15 to 2025-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Coal-Mac LLC → SHM-20 MINER; 2025-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Mitch Potter → Coal-Mac LLC; 2025-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Coal-Mac LLC; 2025-03-20 to 1997-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Coal-Mac LLC; 2025-03-20 to 2019-10-22; source msha-controller-operator-history