# Relationship history for MSHA mine 1800621

Current hierarchy: **Alliance Resource Partners LP → Mettiki Coal LLC → Mettiki 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

- **operator_operates_mine:** Mettiki Coal Corp → Mettiki Mine; 1976-06-18 to 1996-09-09; source msha-controller-operator-history
- **controller_controls_mine:** MAPCO Inc → Mettiki Mine; 1976-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Mettiki Coal Corp; 1976-06-18 to 1996-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Mettiki Coal LLC → Mettiki Mine; 1996-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alliance Resource Partners LP → Mettiki Mine; 1996-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alliance Resource Partners LP → Mettiki Coal LLC; 1996-09-10 to current/open; source msha-controller-operator-history