# Relationship history for MSHA mine 0301957

Current hierarchy: **Pamela R  Pine → Pine's Stone Co Hartford Division → Pine's Stone Co Hartford Division**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Pamela R  Pine → Pine's Stone Co Hartford Division; 1995-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine's Stone Co Hartford Division → Pine's Stone Co Hartford Division; 2007-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pamela R  Pine → Pine's Stone Co Hartford Division; 2007-08-07 to current/open; source msha-controller-operator-history