# Relationship history for MSHA mine 2900812

Current hierarchy: **CR Minerals Company LLC → CR Minerals Company LLC → San Juan Plant**

- 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

- **operator_operates_mine:** James H Rhodes & Company → San Juan Plant; 1950-01-01 to 1997-12-31; source msha-controller-operator-history
- **controller_controls_mine:** James H Rhodes & Company → San Juan Plant; 1950-01-01 to 1997-12-31; source msha-controller-operator-history
- **controller_controls_operator:** James H Rhodes & Company → James H Rhodes & Company; 1950-01-01 to 1997-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Canyon Resources Corp → San Juan Plant; 1987-11-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cr Minerals Corp → San Juan Plant; 1998-01-01 to 1998-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Canyon Resources Corp → Cr Minerals Corp; 1998-01-01 to 1998-12-31; source msha-controller-operator-history
- **operator_operates_mine:** CR Minerals Company LLC → San Juan Plant; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CR Minerals Company LLC → San Juan Plant; 1999-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CR Minerals Company LLC → CR Minerals Company LLC; 1999-01-01 to current/open; source msha-controller-operator-history