# Relationship history for MSHA mine 3502806

Current hierarchy: **Fairchild Gold Corp → Golden Reef Mining Company → Green Back 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

- **operator_operates_mine:** Oregon Gold Mines Inc → Green Back Mine; 1950-01-01 to 1980-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Pieron Wesley J → Green Back Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pieron Wesley J → Oregon Gold Mines Inc; 1950-01-01 to 1980-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Minerals Management Inc → Green Back Mine; 1980-04-01 to 1983-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence T  Atkinson → Green Back Mine; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence T  Atkinson → Minerals Management Inc; 1980-04-01 to 1983-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Oregon Gold Mines Inc → Green Back Mine; 1983-07-07 to 1987-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Pieron Wesley J → Oregon Gold Mines Inc; 1983-07-07 to 1987-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Geo Gold & Silver Corp → Green Back Mine; 1987-02-27 to 1989-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Rogue River Partners & Geo Gold & Silver Corp → Green Back Mine; 1987-02-27 to 1989-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Rogue River Partners & Geo Gold & Silver Corp → Geo Gold & Silver Corp; 1987-02-27 to 1989-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Golden Reef Mining Company → Green Back Mine; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fairchild Gold Corp → Green Back Mine; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fairchild Gold Corp → Golden Reef Mining Company; 1989-06-01 to current/open; source msha-controller-operator-history