# Relationship history for MSHA mine 2302225

Current hierarchy: **Clifford A  Thompson → Captain Sand and Gravel Inc → Captain Sand and Gravel Inc**

- 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:** Bales Farm Sand & Gravel → Captain Sand and Gravel Inc; 2001-03-01 to 2005-07-04; source msha-controller-operator-history
- **controller_controls_mine:** Russell  Edwards et al → Captain Sand and Gravel Inc; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Edwards et al → Bales Farm Sand & Gravel; 2001-03-01 to 2005-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Bales  et al → Bales Farm Sand & Gravel; 2001-03-01 to 2005-07-04; source msha-controller-operator-history
- **controller_controls_mine:** Clifford A  Thompson → Captain Sand and Gravel Inc; 2002-11-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Captain Sand and Gravel Inc → Captain Sand and Gravel Inc; 2005-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clifford A  Thompson → Captain Sand and Gravel Inc; 2005-07-05 to current/open; source msha-controller-operator-history