# Relationship history for MSHA mine 4801654

Current hierarchy: **Stuart  J  Hickman → Ready Rocks Inc → Crusher**

- 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

- **controller_controls_mine:** Stuart  J  Hickman → Crusher; 2003-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ready Rocks Inc → Crusher; 2004-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stuart  J  Hickman → Ready Rocks Inc; 2004-06-02 to current/open; source msha-controller-operator-history