# Relationship history for MSHA mine 4607527

Current hierarchy: **Mc Golden Michael → Genesis Mining Company Inc → Genesis Mining Co Spark #2**

- 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

- **operator_operates_mine:** Alamosa Mining Inc → Genesis Mining Co Spark #2; 1988-06-01 to 1989-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Harry G  Cooke et al → Genesis Mining Co Spark #2; 1988-06-01 to 1989-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Harry G  Cooke et al → Alamosa Mining Inc; 1988-06-01 to 1989-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Genesis Mining Company Inc → Genesis Mining Co Spark #2; 1989-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Golden Michael → Genesis Mining Co Spark #2; 1989-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Golden Michael → Genesis Mining Company Inc; 1989-09-26 to current/open; source msha-controller-operator-history