# Relationship history for MSHA mine 0203398

Current hierarchy: **South32 → South32 Hermosa Inc. → Hermosa Mine**

- 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:** South32 Hermosa Inc. → Hermosa Mine; 2018-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arizona Mining Inc → Hermosa Mine; 2018-03-28 to 2018-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Arizona Mining Inc → South32 Hermosa Inc.; 2018-03-28 to 2018-08-09; source msha-controller-operator-history
- **controller_controls_mine:** South32 → Hermosa Mine; 2018-08-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** South32 → South32 Hermosa Inc.; 2018-08-10 to current/open; source msha-controller-operator-history