# Relationship history for MSHA mine 0405323

Current hierarchy: **Guidry Robert & Cy → Robert Or Cy Guidry → HIGH GRADE #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

- **operator_operates_mine:** Robert Or Cy Guidry → HIGH GRADE #3; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guidry Robert & Cy → HIGH GRADE #3; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guidry Robert & Cy → Robert Or Cy Guidry; 1997-04-01 to current/open; source msha-controller-operator-history