# Relationship history for MSHA mine 4403236

Current hierarchy: **Alliance Resource Partners LP → Permac Inc → Preparation Plant #1**

- 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:** Universal Coal Company Inc → Preparation Plant #1; 1950-01-01 to 1976-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Universal Coal Company Inc → Preparation Plant #1; 1950-01-01 to 1976-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Universal Coal Company Inc → Universal Coal Company Inc; 1950-01-01 to 1976-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Permac Inc → Preparation Plant #1; 1976-02-16 to 1989-10-24; source msha-controller-operator-history
- **controller_controls_mine:** South Atlantic Coal Company Inc → Preparation Plant #1; 1976-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** South Atlantic Coal Company Inc → Permac Inc; 1976-02-16 to 1989-10-24; source msha-controller-operator-history
- **operator_operates_mine:** Permac Inc → Preparation Plant #1; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_mine:** MAPCO Inc → Preparation Plant #1; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Permac Inc; 1989-10-25 to 1996-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Permac Inc → Preparation Plant #1; 1996-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alliance Resource Partners LP → Preparation Plant #1; 1996-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alliance Resource Partners LP → Permac Inc; 1996-10-24 to current/open; source msha-controller-operator-history