# Relationship history for MSHA mine 3304644

Current hierarchy: **Daniel  Montgomery → RiverRock Recycling & Crushing LLC → RiverRock Recycling & Crushing LLC**

- 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:** RiverRock Recycling & Crushing LLC → RiverRock Recycling & Crushing LLC; 2010-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Montgomery → RiverRock Recycling & Crushing LLC; 2010-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Montgomery → RiverRock Recycling & Crushing LLC; 2010-02-23 to current/open; source msha-controller-operator-history