# Relationship history for MSHA mine 0102754

Current hierarchy: **Weinard Nancy B → Black Widow Resources Inc → Black Widow Resources**

- 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:** Black Widow Resources Inc → Black Widow Resources; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Weinard Nancy B → Black Widow Resources; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Weinard Nancy B → Black Widow Resources Inc; 1987-12-01 to current/open; source msha-controller-operator-history