# Relationship history for MSHA mine 4300356

Current hierarchy: **Marcel  Begnoche; Theresa  Begnoche → M & T Sand & Gravel → Berkshire 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** M & T Sand & Gravel → Berkshire Pit; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theresa  Begnoche  et al → Berkshire Pit; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Theresa  Begnoche  et al → M & T Sand & Gravel; 1981-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcel  Begnoche  et al → M & T Sand & Gravel; 1981-05-01 to current/open; source msha-controller-operator-history