# Relationship history for MSHA mine 0203381

Current hierarchy: **Boyd  Branch; Michael  Pilgrim → Micron Recovery LLC → Horseshoe 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:** Micron Recovery LLC → Horseshoe Mine; 2017-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boyd  Branch et al → Horseshoe Mine; 2017-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boyd  Branch et al → Micron Recovery LLC; 2017-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Pilgrim et al → Micron Recovery LLC; 2017-04-26 to current/open; source msha-controller-operator-history