# Relationship history for MSHA mine 3609368

Current hierarchy: **Robert C  See → Robert C See → See's Gravel Pitt #1**

- 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:** Robert C See → See's Gravel Pitt #1; 2005-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  See → See's Gravel Pitt #1; 2005-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  See → Robert C See; 2005-09-29 to current/open; source msha-controller-operator-history