# Relationship history for MSHA mine 4801659

Current hierarchy: **Donald O  Ford; Carole A  Ford → Wind River Quarry → Wind River Quarry**

- 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:** Southwick Stone Inc → Wind River Quarry; 2004-08-17 to 2006-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Glenn E  Southwick → Wind River Quarry; 2004-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn E  Southwick → Southwick Stone Inc; 2004-08-17 to 2006-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Wind River Quarry → Wind River Quarry; 2006-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Donald O  Ford et al → Wind River Quarry; 2006-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald O  Ford et al → Wind River Quarry; 2006-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carole A  Ford et al → Wind River Quarry; 2006-09-06 to current/open; source msha-controller-operator-history