# Relationship history for MSHA mine 4102371

Current hierarchy: **Berry Contracting Inc → Bay Ltd → Reynolds 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:** Bill Wright Enterprises Inc → Reynolds Pit; 1950-01-01 to 1981-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Wright Bill → Reynolds Pit; 1950-01-01 to 1981-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Wright Bill → Bill Wright Enterprises Inc; 1950-01-01 to 1981-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Bay Ltd → Reynolds Pit; 1981-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Berry Contracting Inc → Reynolds Pit; 1981-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berry Contracting Inc → Bay Ltd; 1981-02-03 to current/open; source msha-controller-operator-history