# Relationship history for MSHA mine 1001612

Current hierarchy: **Resource Eng & Develop Inc & Hoskins Western Soder → Hws Gold & Silver Ltd → Buster Leach Plant**

- 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:** Hws Gold & Silver Ltd → Buster Leach Plant; 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Resource Eng & Develop Inc & Hoskins Western Soder → Buster Leach Plant; 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Resource Eng & Develop Inc & Hoskins Western Soder → Hws Gold & Silver Ltd; 1983-06-01 to current/open; source msha-controller-operator-history