# Relationship history for MSHA mine 2602059

Current hierarchy: **Patricia  Thacke; Shirel  Ross → Patricia Thacke → Patsy**

- 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

- **controller_controls_mine:** Patricia  Thacke et al → Patsy; 1981-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Patricia Thacke → Patsy; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patricia  Thacke et al → Patricia Thacke; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shirel  Ross et al → Patricia Thacke; 1988-06-01 to current/open; source msha-controller-operator-history