# Relationship history for MSHA mine 1700517

Current hierarchy: **Mc Crillis Dean → Plumbago Mining Corp → Upper And Lower Mt Rubellite**

- 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:** Mc Crillis Dean → Upper And Lower Mt Rubellite; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Plumbago Mining Corp → Upper And Lower Mt Rubellite; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Crillis Dean → Plumbago Mining Corp; 1980-05-01 to current/open; source msha-controller-operator-history