# Relationship history for MSHA mine 2400775

Current hierarchy: **Jerod  Edington → Yogold U.S.A. Corporation → YOGO SAPPHIRE 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:** Cyprus Amax Minerals Company → YOGO SAPPHIRE MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bullock Exploration Inc → YOGO SAPPHIRE MINE; 1981-04-01 to 1983-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Bullock Robert C → YOGO SAPPHIRE MINE; 1981-04-01 to 1983-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Bullock Robert C → Bullock Exploration Inc; 1981-04-01 to 1983-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Intergem Inc → YOGO SAPPHIRE MINE; 1983-10-26 to 1986-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Brown Dennis K → YOGO SAPPHIRE MINE; 1983-10-26 to 1986-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Brown Dennis K → Intergem Inc; 1983-10-26 to 1986-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Roncor Inc → YOGO SAPPHIRE MINE; 1986-09-02 to 1993-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Kunisaki Ronald H → YOGO SAPPHIRE MINE; 1986-09-02 to 2001-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Kunisaki Ronald H → Roncor Inc; 1986-09-02 to 1993-09-06; source msha-controller-operator-history
- **operator_operates_mine:** Amax Exploration Inc → YOGO SAPPHIRE MINE; 1993-09-07 to 1995-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Amax Exploration Inc; 1993-09-07 to 1995-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Roncor Inc → YOGO SAPPHIRE MINE; 1995-05-04 to 2001-06-25; source msha-controller-operator-history
- **controller_controls_operator:** Kunisaki Ronald H → Roncor Inc; 1995-05-04 to 2001-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Sapphire Company Ltd → YOGO SAPPHIRE MINE; 2001-06-26 to 2020-06-03; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Quartermain → YOGO SAPPHIRE MINE; 2001-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Quartermain → Pacific Sapphire Company Ltd; 2001-06-26 to 2020-06-03; source msha-controller-operator-history
- **operator_operates_mine:** Yogold U.S.A. Corporation → YOGO SAPPHIRE MINE; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerod  Edington → YOGO SAPPHIRE MINE; 2020-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerod  Edington → Yogold U.S.A. Corporation; 2020-06-04 to current/open; source msha-controller-operator-history