# Relationship history for MSHA mine 4202643

Current hierarchy: **Steve L  Gilbert → Gilbert Development Corporation → GDC Crusher # 3**

- 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

- **controller_controls_mine:** Steve L  Gilbert → GDC Crusher # 3; 1985-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gilbert Development Corporation → GDC Crusher # 3; 2015-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve L  Gilbert → Gilbert Development Corporation; 2015-04-23 to current/open; source msha-controller-operator-history