# Relationship history for MSHA mine 3003526

Current hierarchy: **C Thomas  Chilewski → Chilewski Flagstone → Sun-Up Quarry**

- 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:** C Thomas  Chilewski → Sun-Up Quarry; 1997-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chilewski Flagstone → Sun-Up Quarry; 2005-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C Thomas  Chilewski → Chilewski Flagstone; 2005-11-01 to current/open; source msha-controller-operator-history