# Relationship history for MSHA mine 0502981

Current hierarchy: **Anschutz Corp → Anschutz Mining Corp → C-Sr-12**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** St Jude Mining Company → C-Sr-12; 1950-01-01 to 1979-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Haldane Richard → C-Sr-12; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haldane Richard → St Jude Mining Company; 1950-01-01 to 1979-06-26; source msha-controller-operator-history
- **controller_controls_mine:** Anschutz Corp → C-Sr-12; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anschutz Mining Corp → C-Sr-12; 1979-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anschutz Corp → Anschutz Mining Corp; 1979-06-27 to current/open; source msha-controller-operator-history