# Relationship history for MSHA mine 4105719

Current hierarchy: **Jose C Regalado; Sofia A Regalado → J & S Materials LLC → Freer Plant**

- 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:** Sofia A Regalado et al → Freer Plant; 2016-05-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & S Materials LLC → Freer Plant; 2024-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sofia A Regalado et al → J & S Materials LLC; 2024-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose C Regalado et al → J & S Materials LLC; 2024-01-09 to current/open; source msha-controller-operator-history