# Relationship history for MSHA mine 3609579

Current hierarchy: **Brian D  Crockett; Jeffery E  Osmun → Quarry Services LLC → Light Quarry**

- 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

- **controller_controls_mine:** Brian D  Crockett et al → Light Quarry; 2006-01-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Quarry Services LLC → Light Quarry; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian D  Crockett et al → Quarry Services LLC; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffery E  Osmun et al → Quarry Services LLC; 2008-01-14 to current/open; source msha-controller-operator-history