# Relationship history for MSHA mine 1200123

Current hierarchy: **Larry  Gerig → Stone-Street Quarries, Inc. → Stone-Street Quarries Inc**

- 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:** Stone-Street Gravel Inc → Stone-Street Quarries Inc; 1950-01-01 to 1987-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Bercot → Stone-Street Quarries Inc; 1950-01-01 to 1987-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Bercot → Stone-Street Gravel Inc; 1950-01-01 to 1987-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Stone-Street Quarries, Inc. → Stone-Street Quarries Inc; 1987-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Gerig → Stone-Street Quarries Inc; 1987-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Gerig → Stone-Street Quarries, Inc.; 1987-09-16 to current/open; source msha-controller-operator-history