# Relationship history for MSHA mine 4104397

Current hierarchy: **Rick  Cardinal → Rock-It Materials → Lobo 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:** Rock-It Materials → Lobo Quarry; 2003-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Cardinal → Lobo Quarry; 2003-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Cardinal → Rock-It Materials; 2003-01-23 to current/open; source msha-controller-operator-history