# Relationship history for MSHA mine 0600667

Current hierarchy: **Richard  Cheney → Ri-Che → MILLER ROAD PIT**

- 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:** R & R Enterprises → MILLER ROAD PIT; 1998-11-01 to 2000-10-22; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Morin → MILLER ROAD PIT; 1998-11-01 to 2000-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Morin → R & R Enterprises; 1998-11-01 to 2000-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Ri-Che → MILLER ROAD PIT; 2000-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Cheney → MILLER ROAD PIT; 2000-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Cheney → Ri-Che; 2000-10-23 to current/open; source msha-controller-operator-history