# Relationship history for MSHA mine 3608892

Current hierarchy: **Sara J  Wood → Sara Wood → P & S Stone Quarry (Portable)**

- 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

- **operator_operates_mine:** P & M Stone → P & S Stone Quarry (Portable); 2000-12-01 to 2011-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Mc Carey et al → P & S Stone Quarry (Portable); 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Mc Carey et al → P & M Stone; 2000-12-01 to 2011-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Philip  Wood et al → P & M Stone; 2000-12-01 to 2011-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Sara Wood → P & S Stone Quarry (Portable); 2011-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sara J  Wood → P & S Stone Quarry (Portable); 2011-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sara J  Wood → Sara Wood; 2011-08-18 to current/open; source msha-controller-operator-history