# Relationship history for MSHA mine 4609646

Current hierarchy: **John Mitch Potter → Coal-Mac MET, LLC → SHM-45**

- 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:** John T  Quintrell → SHM-45; 2019-09-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Civil, LLC → SHM-45; 2023-02-06 to 2026-03-11; source msha-controller-operator-history
- **controller_controls_operator:** John T  Quintrell → Civil, LLC; 2023-02-06 to 2026-03-11; source msha-controller-operator-history
- **controller_controls_mine:** John Mitch Potter → SHM-45; 2025-06-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal-Mac MET, LLC → SHM-45; 2026-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John Mitch Potter → Coal-Mac MET, LLC; 2026-03-12 to current/open; source msha-controller-operator-history