# Relationship history for MSHA mine 0901011

Current hierarchy: **Gidon  Yonyoff → Blackfoot Stone Co Inc → Scales Pit**

- 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

- **controller_controls_mine:** Gidon  Yonyoff → Scales Pit; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & C Stone Development Inc → Scales Pit; 1988-01-01 to 1990-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Daniel A  Crickx → Scales Pit; 1988-01-01 to 1990-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Daniel A  Crickx → C & C Stone Development Inc; 1988-01-01 to 1990-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Blackfoot Stone Co Inc → Scales Pit; 1990-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gidon  Yonyoff → Blackfoot Stone Co Inc; 1990-10-30 to current/open; source msha-controller-operator-history