# Relationship history for MSHA mine 0201433

Current hierarchy: **Johnny  Weik III → Superstition Crushing L.L.C. → Mine #1**

- 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:** Sun Valley Crushing Company → Mine #1; 1950-01-01 to 1986-02-28; source msha-controller-operator-history
- **controller_controls_mine:** William A  Walker → Mine #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William A  Walker → Sun Valley Crushing Company; 1950-01-01 to 1986-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Superstition Crushing L.L.C. → Mine #1; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnny  Weik III et al → Mine #1; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnny  Weik III et al → Superstition Crushing L.L.C.; 1993-07-01 to current/open; source msha-controller-operator-history