# Relationship history for MSHA mine 1901314

Current hierarchy: **William L  French Jr → W. L. French Excavating Corporation → 580 River Street Quarry**

- 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

- **controller_controls_mine:** William L  French Jr → 580 River Street Quarry; 2019-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W. L. French Excavating Corporation → 580 River Street Quarry; 2023-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William L  French Jr → W. L. French Excavating Corporation; 2023-01-11 to current/open; source msha-controller-operator-history