# Relationship history for MSHA mine 0503853

Current hierarchy: **Hatfield Herbert → Hatfield Mining Inc → Canyon Claims #8**

- 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:** Hatfield Mining Inc → Canyon Claims #8; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hatfield Herbert → Canyon Claims #8; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Herbert → Hatfield Mining Inc; 1983-05-01 to current/open; source msha-controller-operator-history