# Relationship history for MSHA mine 0401952

Current hierarchy: **Henry F  Hunte → Sorrento Ready Mix Inc → Sorrento Pit**

- 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:** Sorrento Sand Company Inc → Sorrento Pit; 1950-01-01 to 1985-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Elizabeth  Riis → Sorrento Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elizabeth  Riis → Sorrento Sand Company Inc; 1950-01-01 to 1985-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Sorrento Ready Mix Inc → Sorrento Pit; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry F  Hunte et al → Sorrento Pit; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry F  Hunte et al → Sorrento Ready Mix Inc; 1985-05-01 to current/open; source msha-controller-operator-history