# Relationship history for MSHA mine 2302362

Current hierarchy: **James  Boyer → Cedar Hill Quarry LLC → Cedar Hill 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** D J Collins Inc → Cedar Hill Quarry; 2007-06-21 to 2008-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Collins → Cedar Hill Quarry; 2007-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Collins → D J Collins Inc; 2007-06-21 to 2008-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Hill Quarry LLC → Cedar Hill Quarry; 2008-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Boyer → Cedar Hill Quarry; 2008-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Boyer → Cedar Hill Quarry LLC; 2008-08-18 to current/open; source msha-controller-operator-history