# Relationship history for MSHA mine 2103562

Current hierarchy: **Douglas A  Rupp → Rupp Construction Co Inc → Rupp-Roll Crusher**

- 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:** Douglas A  Rupp → Rupp-Roll Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rupp Construction Co., Inc. → Rupp-Roll Crusher; 2006-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Rupp → Rupp Construction Co., Inc.; 2006-10-25 to current/open; source msha-controller-operator-history