# Relationship history for MSHA mine 4104338

Current hierarchy: **Rogelio  Soliz Jr → El Chaparral Sand & Gravel Inc. → El Chaparral Sand & Gravel Inc.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** El Chaparral Sand & Gravel Inc. → El Chaparral Sand & Gravel Inc.; 2002-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rogelio  Soliz Jr et al → El Chaparral Sand & Gravel Inc.; 2002-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogelio  Soliz Jr et al → El Chaparral Sand & Gravel Inc.; 2002-02-06 to current/open; source msha-controller-operator-history