# Relationship history for MSHA mine 1002385

Current hierarchy: **Darren D  Lee → Total Rock LLC → Mason Ranch 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:** Total Rock LLC → Mason Ranch Quarry; 2025-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darren D  Lee → Mason Ranch Quarry; 2025-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darren D  Lee → Total Rock LLC; 2025-08-13 to current/open; source msha-controller-operator-history