# Relationship history for MSHA mine 1701125

Current hierarchy: **Russell M  Holmes → O. W. Holmes, Inc. → Portable Plant 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Russell M  Holmes → Portable Plant 1; 2019-10-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** O W Holmes Inc → Portable Plant 1; 2024-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell M  Holmes → O W Holmes Inc; 2024-06-20 to current/open; source msha-controller-operator-history