# Relationship history for MSHA mine 0202060

Current hierarchy: **Dale Vernon B → Vernon B Dale → California Millsite**

- 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

- **operator_operates_mine:** Vernon B Dale → California Millsite; 1981-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale Vernon B → California Millsite; 1981-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale Vernon B → Vernon B Dale; 1981-07-25 to current/open; source msha-controller-operator-history