# Relationship history for MSHA mine 0203261

Current hierarchy: **Concept Reality LLC; Douglas A  Farley → Plomosa Placers → Gold Rock**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Plomosa Placers → Gold Rock; 2010-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Douglas A  Farley et al → Gold Rock; 2010-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Farley et al → Plomosa Placers; 2010-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Concept Reality LLC et al → Plomosa Placers; 2010-02-19 to current/open; source msha-controller-operator-history