# Relationship history for MSHA mine 2302055

Current hierarchy: **Clifford A  Thompson → Captain Sand & Gravel → Captain Sand & 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:** Kelley Sand & Gravel Inc → Captain Sand & Gravel Inc; 1992-03-01 to 1999-05-26; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Kelley → Captain Sand & Gravel Inc; 1992-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Kelley → Kelley Sand & Gravel Inc; 1992-03-01 to 1999-05-26; source msha-controller-operator-history
- **operator_operates_mine:** Waynesville Sand LLC → Captain Sand & Gravel Inc; 1999-05-27 to 2002-11-17; source msha-controller-operator-history
- **controller_controls_mine:** Pat  Patterson → Captain Sand & Gravel Inc; 1999-05-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pat  Patterson → Waynesville Sand LLC; 1999-05-27 to 2002-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Captain Sand & Gravel → Captain Sand & Gravel Inc; 2002-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clifford A  Thompson → Captain Sand & Gravel Inc; 2002-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clifford A  Thompson → Captain Sand & Gravel; 2002-11-18 to current/open; source msha-controller-operator-history