# Relationship history for MSHA mine 2902139

Current hierarchy: **Equalizer Inc → St Cloud Mining Company → Portable Crusher**

- 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:** Goldfield Corp → Portable Crusher; 1950-01-01 to 2002-12-03; source msha-controller-operator-history
- **operator_operates_mine:** St Cloud Mining Company → Portable Crusher; 1994-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goldfield Corp → St Cloud Mining Company; 1994-10-01 to 2002-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Imagin Minerals Incorporated → Portable Crusher; 2002-12-04 to 2024-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Imagin Minerals Incorporated → St Cloud Mining Company; 2002-12-04 to 2024-12-12; source msha-controller-operator-history
- **controller_controls_mine:** Equalizer Inc → Portable Crusher; 2024-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Equalizer Inc → St Cloud Mining Company; 2024-12-13 to current/open; source msha-controller-operator-history