# Relationship history for MSHA mine 1700963

Current hierarchy: **Elaine M Beauregard; Mark  Beauregard → Mark Beauregard Inc. → Madrid Gravel 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:** Mark Beauregard Inc. → Madrid Gravel Pit; 2015-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elaine M Beauregard et al → Madrid Gravel Pit; 2015-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elaine M Beauregard et al → Mark Beauregard Inc.; 2015-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Beauregard et al → Mark Beauregard Inc.; 2015-08-12 to current/open; source msha-controller-operator-history