# Relationship history for MSHA mine 0404669

Current hierarchy: **Plumas Gold Mines Ltd → Plumas Gold Mines Usa Inc → Plumas Gold Mine**

- 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:** Sunshine Mining & Refining Company → Plumas Gold Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Feather Fork Mines Company Et Al → Plumas Gold Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Feather Fork Mines Ltd → Plumas Gold Mine; 1983-09-01 to 1984-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Feather Fork Mines Company Et Al → Feather Fork Mines Ltd; 1983-09-01 to 1984-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Sunshine Mining Company → Plumas Gold Mine; 1984-10-10 to 1989-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Sunshine Mining & Refining Company → Sunshine Mining Company; 1984-10-10 to 1989-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Plumas Gold Mines Usa Inc → Plumas Gold Mine; 1989-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Plumas Gold Mines Ltd → Plumas Gold Mine; 1989-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Plumas Gold Mines Ltd → Plumas Gold Mines Usa Inc; 1989-07-28 to current/open; source msha-controller-operator-history