# Relationship history for MSHA mine 4703566

Current hierarchy: **Ronald S.  Harvey → Harvey Rock LLC → Harvey Rock LLC Plant 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Ronald S.  Harvey → Harvey Rock LLC Plant 2; 2006-10-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harvey Rock LLC → Harvey Rock LLC Plant 2; 2009-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald S.  Harvey → Harvey Rock LLC; 2009-06-22 to current/open; source msha-controller-operator-history