# Relationship history for MSHA mine 4202418

Current hierarchy: **Michael  Walker; Dusten L Heugly → PROVO CANYON AGGREGATES AND RECYCLING, LLC → Provo Canyon Pit**

- 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:** Vanrok, LLC → Provo Canyon Pit; 2005-08-24 to 2024-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Leon  VanSickle et al → Provo Canyon Pit; 2005-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon  VanSickle et al → Vanrok, LLC; 2005-08-24 to 2024-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Marylynn  VanSickle et al → Vanrok, LLC; 2005-08-24 to 2024-12-01; source msha-controller-operator-history
- **operator_operates_mine:** PROVO CANYON AGGREGATES AND RECYCLING, LLC → Provo Canyon Pit; 2024-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Walker et al → Provo Canyon Pit; 2024-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Walker et al → PROVO CANYON AGGREGATES AND RECYCLING, LLC; 2024-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dusten L Heugly et al → PROVO CANYON AGGREGATES AND RECYCLING, LLC; 2024-12-02 to current/open; source msha-controller-operator-history