# Relationship history for MSHA mine 0203336

Current hierarchy: **Baroyeca Gold and Silver → Aztec Minerals America → Emerald 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:** Tombstone Gold and Silver, Inc → Emerald Pit; 2014-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baroyeca Gold and Silver → Emerald Pit; 2014-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baroyeca Gold and Silver → Tombstone Gold and Silver, Inc; 2014-06-11 to current/open; source msha-controller-operator-history