# Relationship history for MSHA mine 1001460

Current hierarchy: **Ken  Stutzman → Twin Falls Crushing, Inc. → Twin Falls Crushing P P**

- 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:** Duane S  Schrank → Twin Falls Crushing P P; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Twin Falls Construction Company Inc → Twin Falls Crushing P P; 1980-05-01 to 1996-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Duane S  Schrank → Twin Falls Construction Company Inc; 1980-05-01 to 1996-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Twin Falls Crushing, Inc. → Twin Falls Crushing P P; 1996-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ken  Stutzman → Twin Falls Crushing P P; 1996-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ken  Stutzman → Twin Falls Crushing, Inc.; 1996-06-28 to current/open; source msha-controller-operator-history