# Relationship history for MSHA mine 1002339

Current hierarchy: **Ronald J  Holdeman → Magic Valley Crushing & Excavation → Crusher 2**

- 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:** Magic Valley Crushing & Excavation → Crusher 2; 2022-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald J  Holdeman → Crusher 2; 2022-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald J  Holdeman → Magic Valley Crushing & Excavation; 2022-02-28 to current/open; source msha-controller-operator-history