# Relationship history for MSHA mine 1001756

Current hierarchy: **Aslan Indira L → Precious Metals Technology Inc → Princess Blue Ribbon**

- 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:** Solomon Mining Company → Princess Blue Ribbon; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Baldwin Dennis Craig → Princess Blue Ribbon; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Baldwin Dennis Craig → Solomon Mining Company; 1986-08-01 to 1987-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Precious Metals Technology Inc → Princess Blue Ribbon; 1987-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aslan Indira L Et Al → Princess Blue Ribbon; 1987-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aslan Indira L Et Al → Precious Metals Technology Inc; 1987-10-14 to current/open; source msha-controller-operator-history