# Relationship history for MSHA mine 1001011

Current hierarchy: **Rolls Ernest L → Rothschild Mining Corp → Warm Springs Mill**

- 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:** Grandview Metals Inc → Warm Springs Mill; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Truman Karl → Warm Springs Mill; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Truman Karl → Grandview Metals Inc; 1950-01-01 to 1979-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Cash Industries Inc → Warm Springs Mill; 1979-07-01 to 1986-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Cash H P → Warm Springs Mill; 1979-07-01 to 1987-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Cash H P → Cash Industries Inc; 1979-07-01 to 1986-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Rothschild Mining Corp → Warm Springs Mill; 1986-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rolls Ernest L → Warm Springs Mill; 1986-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rolls Ernest L → Rothschild Mining Corp; 1986-08-11 to current/open; source msha-controller-operator-history