# Relationship history for MSHA mine 4103881

Current hierarchy: **Berry Contracting Inc → Bay Ltd → Tale Lake**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Berry Contracting Inc → Tale Lake; 1981-02-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bay Ltd → Tale Lake; 1996-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Berry Contracting Inc → Bay Ltd; 1996-01-01 to current/open; source msha-controller-operator-history