# Relationship history for MSHA mine 2103955

Current hierarchy: **Travis  Brey; Susan  Skoblik → Brey Tiling → #1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Brey Tiling → #1 Plant; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Skoblik et al → #1 Plant; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Skoblik et al → Brey Tiling; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis  Brey et al → Brey Tiling; 2019-08-27 to current/open; source msha-controller-operator-history