# Relationship history for MSHA mine 3610350

Current hierarchy: **Jose Ruben Samaniego → Natural Stone Quarry LLC → Bluestone Operation**

- 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:** Samaniego Stone LLC → Bluestone Operation; 2020-11-20 to 2024-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Milton Alfredo Samaniego Chacon → Bluestone Operation; 2020-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milton Alfredo Samaniego Chacon → Samaniego Stone LLC; 2020-11-20 to 2024-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Natural Stone Quarry LLC → Bluestone Operation; 2024-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jose Ruben Samaniego → Bluestone Operation; 2024-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose Ruben Samaniego → Natural Stone Quarry LLC; 2024-03-17 to current/open; source msha-controller-operator-history