# Relationship history for MSHA mine 2902216

Current hierarchy: **Raul  Vasquez → Blue Mountain Stone Inc → Blue Mountain Stone**

- 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

- **controller_controls_mine:** Raul  Vasquez → Blue Mountain Stone; 1987-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Garita Stone Buzzards Inc → Blue Mountain Stone; 2001-02-01 to 2009-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Luis  Vasquez → Blue Mountain Stone; 2001-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Luis  Vasquez → Garita Stone Buzzards Inc; 2001-02-01 to 2009-05-10; source msha-controller-operator-history
- **operator_operates_mine:** Blue Mountain Stone Inc → Blue Mountain Stone; 2009-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raul  Vasquez → Blue Mountain Stone Inc; 2009-05-11 to current/open; source msha-controller-operator-history