# Relationship history for MSHA mine 2902393

Current hierarchy: **Charles  Johnson; Armando  Reyna → American Redi Mix → American Redi Mix**

- 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:** American Redi Mix → American Redi Mix; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Johnson et al → American Redi Mix; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Johnson et al → American Redi Mix; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Armando  Reyna et al → American Redi Mix; 2009-04-30 to current/open; source msha-controller-operator-history