# Relationship history for MSHA mine 3503574

Current hierarchy: **Monica J  Platt; Frank E Platt → Red Cloud Specialty Contractors → Red Cloud Portable Crusher # 2   P-32**

- 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:** Frank E Platt et al → Red Cloud Portable Crusher # 2   P-32; 2001-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Cloud Specialty Contractors → Red Cloud Portable Crusher # 2   P-32; 2003-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank E Platt et al → Red Cloud Specialty Contractors; 2003-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monica J  Platt et al → Red Cloud Specialty Contractors; 2003-04-16 to current/open; source msha-controller-operator-history