# Relationship history for MSHA mine 1202200

Current hierarchy: **George F  Kopetsky II → Kopetsky Hauling → Kopetsky Sand & Gravel**

- 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:** George F  Kopetsky II → Kopetsky Sand & Gravel; 1990-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kopetsky Hauling → Kopetsky Sand & Gravel; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George F  Kopetsky II → Kopetsky Hauling; 1996-07-01 to current/open; source msha-controller-operator-history