# Relationship history for MSHA mine 4600146

Current hierarchy: **C Lynch  Christian III → Continental Brick Company → Continental Brick Company Shale Pit**

- 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:** Continental Clay Products Company → Continental Brick Company Shale Pit; 1950-01-01 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_mine:** General Industries Inc → Continental Brick Company Shale Pit; 1950-01-01 to 1984-06-27; source msha-controller-operator-history
- **controller_controls_operator:** General Industries Inc → Continental Clay Products Company; 1950-01-01 to 1984-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Continental Brick Company → Continental Brick Company Shale Pit; 1984-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** C Lynch  Christian III → Continental Brick Company Shale Pit; 1984-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C Lynch  Christian III → Continental Brick Company; 1984-06-28 to current/open; source msha-controller-operator-history