# Relationship history for MSHA mine 4703913

Current hierarchy: **Thomas J Beaudry → Cass Custom Crushing, LLC → 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

- **operator_operates_mine:** Merget Materials, LLC → Plant 1; 2021-11-17 to 2022-12-28; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J Beaudry → Plant 1; 2021-11-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J Beaudry → Merget Materials, LLC; 2021-11-17 to 2022-12-28; source msha-controller-operator-history
- **operator_operates_mine:** Cass Custom Crushing, LLC → Plant 1; 2022-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J Beaudry → Plant 1; 2022-12-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J Beaudry → Cass Custom Crushing, LLC; 2022-12-29 to current/open; source msha-controller-operator-history