# Relationship history for MSHA mine 2103954

Current hierarchy: **Ordell H Thompson; Lyle C Thompson → Thompson and Thompson → Thompson Sand 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Thompson and Thompson → Thompson Sand Pit; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ordell H Thompson et al → Thompson Sand Pit; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ordell H Thompson et al → Thompson and Thompson; 2019-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyle C Thompson et al → Thompson and Thompson; 2019-08-27 to current/open; source msha-controller-operator-history