# Relationship history for MSHA mine 0404504

Current hierarchy: **Nixon Donald A → First California Financial & Development → China Bar/Insurance #1**

- 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:** First California Financial & Development → China Bar/Insurance #1; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nixon Donald A → China Bar/Insurance #1; 1981-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nixon Donald A → First California Financial & Development; 1981-04-01 to current/open; source msha-controller-operator-history