# Relationship history for MSHA mine 3004029

Current hierarchy: **Randal  Richers → NY Crushing & Recycling → Sandvik Crusher QI 341 CE017**

- 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:** Randal  Richers → Sandvik Crusher QI 341 CE017; 2016-04-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** NY Crushing & Recycling → Sandvik Crusher QI 341 CE017; 2018-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randal  Richers → NY Crushing & Recycling; 2018-12-10 to current/open; source msha-controller-operator-history