# Relationship history for MSHA mine 1001878

Current hierarchy: **Robert Paul  Younger; Amy L  Younger → River City Red E Mix LLC → River City Red E Mix LLC**

- 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

- **operator_operates_mine:** Cooper Ready-Mix → River City Red E Mix LLC; 1992-05-01 to 2014-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Arvin  Cooper → River City Red E Mix LLC; 1992-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arvin  Cooper → Cooper Ready-Mix; 1992-05-01 to 2014-05-18; source msha-controller-operator-history
- **operator_operates_mine:** River City Red E Mix LLC → River City Red E Mix LLC; 2014-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert Paul  Younger et al → River City Red E Mix LLC; 2014-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert Paul  Younger et al → River City Red E Mix LLC; 2014-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy L  Younger et al → River City Red E Mix LLC; 2014-05-19 to current/open; source msha-controller-operator-history