# Relationship history for MSHA mine 2902059

Current hierarchy: **Goldfield Corp → Lordsburg Mining Company → North Atwood Tunnel**

- 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

- **controller_controls_mine:** Goldfield Corp → North Atwood Tunnel; 1990-04-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lordsburg Mining Company → North Atwood Tunnel; 1990-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goldfield Corp → Lordsburg Mining Company; 1990-09-01 to current/open; source msha-controller-operator-history