# Relationship history for MSHA mine 0404647

Current hierarchy: **Donald D  Chapin Jr → Don Chapin Company Inc → PLANT 25**

- 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:** Henry  Matoza Jr → PLANT 25; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hillsdale Rock Company → PLANT 25; 1983-06-01 to 1998-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Henry  Matoza Jr → Hillsdale Rock Company; 1983-06-01 to 1998-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Don Chapin Company Inc → PLANT 25; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald D  Chapin Jr → PLANT 25; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald D  Chapin Jr → Don Chapin Company Inc; 1998-08-01 to current/open; source msha-controller-operator-history