# Relationship history for MSHA mine 4607678

Current hierarchy: **Owens George → Gold River Mining Company Inc → Barbara Lynn #4**

- 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:** Owens George → Barbara Lynn #4; 1987-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maynard Don → Barbara Lynn #4; 1988-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R Bruce  Ferguson et al → Barbara Lynn #4; 1989-02-06 to 1990-10-15; source msha-controller-operator-history
- **operator_operates_mine:** C M Brier Corp → Barbara Lynn #4; 1989-03-01 to 1990-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Maynard Don → C M Brier Corp; 1989-03-01 to 1990-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Fiesta Mining Inc → Barbara Lynn #4; 1990-09-18 to 1990-10-15; source msha-controller-operator-history
- **controller_controls_operator:** R Bruce  Ferguson et al → Fiesta Mining Inc; 1990-09-18 to 1990-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Gold River Mining Company Inc → Barbara Lynn #4; 1990-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owens George → Gold River Mining Company Inc; 1990-10-16 to current/open; source msha-controller-operator-history