# Relationship history for MSHA mine 1513031

Current hierarchy: **Rose Michael → R & W Mining → No 1**

- 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:** Sorensen Mike & Gary E Compton → No 1; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crawford Lawrence & Dennis Ray → No 1; 1980-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Victor Mining Corp → No 1; 1981-08-01 to 1981-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Silvers Norman R → No 1; 1981-08-01 to 1981-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Silvers Norman R → Victor Mining Corp; 1981-08-01 to 1981-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Ramex Mining Corp → No 1; 1981-08-17 to 1981-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Sorensen Mike & Gary E Compton → Ramex Mining Corp; 1981-08-17 to 1981-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Laray Inc → No 1; 1981-09-15 to 1982-09-16; source msha-controller-operator-history
- **controller_controls_operator:** Crawford Lawrence & Dennis Ray → Laray Inc; 1981-09-15 to 1982-09-16; source msha-controller-operator-history
- **operator_operates_mine:** R & W Mining → No 1; 1982-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rose Michael Et Al → No 1; 1982-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rose Michael Et Al → R & W Mining; 1982-09-17 to current/open; source msha-controller-operator-history