# Relationship history for MSHA mine 2302194

Current hierarchy: **Riverstone Group → Central Stone Company → Moscow Mills Plant CS57**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Riverstone Group → Moscow Mills Plant CS57; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J H Berra Inc → Moscow Mills Plant CS57; 1999-11-01 to 2004-10-13; source msha-controller-operator-history
- **controller_controls_mine:** John H Berra Construction Co → Moscow Mills Plant CS57; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John H Berra Construction Co → J H Berra Inc; 1999-11-01 to 2004-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Central Stone Company → Moscow Mills Plant CS57; 2004-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Riverstone Group → Central Stone Company; 2004-10-14 to current/open; source msha-controller-operator-history