# Relationship history for MSHA mine 2402448

Current hierarchy: **Ken A.  Miller → Ken Miller Construction Inc → Rock Farm**

- 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:** Ken Miller Construction Inc → Rock Farm; 2006-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ken A.  Miller → Rock Farm; 2006-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ken A.  Miller → Ken Miller Construction Inc; 2006-05-31 to current/open; source msha-controller-operator-history