# Relationship history for MSHA mine 2003381

Current hierarchy: **RR Holdco, Inc. → Rieth-Riley Construction Co., Inc. → 7916 Portable Wash Plant**

- 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

- **controller_controls_mine:** Rieth-Riley Construction Company Inc → 7916 Portable Wash Plant; 1950-01-01 to 2025-01-30; source msha-controller-operator-history
- **operator_operates_mine:** Rieth-Riley Construction Co., Inc. → 7916 Portable Wash Plant; 2007-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rieth-Riley Construction Company Inc → Rieth-Riley Construction Co., Inc.; 2007-01-30 to 2025-01-30; source msha-controller-operator-history
- **controller_controls_mine:** RR Holdco, Inc. → 7916 Portable Wash Plant; 2025-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RR Holdco, Inc. → Rieth-Riley Construction Co., Inc.; 2025-01-31 to current/open; source msha-controller-operator-history