# Relationship history for MSHA mine 5001950

Current hierarchy: **Fred  Hurt → Blue Ribbon Gold, Inc → Jim Nail Placer**

- 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:** Monaco Mining LLC → Jim Nail Placer; 2011-02-14 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Todd R  Hoffman → Jim Nail Placer; 2011-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd R  Hoffman → Monaco Mining LLC; 2011-02-14 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Blue Ribbon Gold, Inc → Jim Nail Placer; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Hurt → Jim Nail Placer; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Hurt → Blue Ribbon Gold, Inc; 2011-06-15 to current/open; source msha-controller-operator-history