# Relationship history for MSHA mine 0401754

Current hierarchy: **Calvin  Cheek; Alvin  Cheek → Oildale Ready Mix → Tulare Rock Company**

- 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:** Oildale Ready Mix → Tulare Rock Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calvin  Cheek  et al → Tulare Rock Company; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calvin  Cheek  et al → Oildale Ready Mix; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alvin  Cheek  et al → Oildale Ready Mix; 1950-01-01 to current/open; source msha-controller-operator-history