# Relationship history for MSHA mine 3609462

Current hierarchy: **Adam M  Diaz → Diaz Stone and Pallet Inc → Nicholson 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:** Diaz Stone and Pallet Inc → Nicholson Mine; 2006-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adam M  Diaz → Nicholson Mine; 2006-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adam M  Diaz → Diaz Stone and Pallet Inc; 2006-08-02 to current/open; source msha-controller-operator-history