# Relationship history for MSHA mine 0504195

Current hierarchy: **Raul  Vasquez → Blue Mountain Stone Inc → NOLAND 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:** Phillips Stone Company Inc → NOLAND QUARRY; 1986-12-01 to 2021-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Frances A  Phillips → NOLAND QUARRY; 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frances A  Phillips → Phillips Stone Company Inc; 1986-12-01 to 2021-05-24; source msha-controller-operator-history
- **controller_controls_mine:** Raul  Vasquez → NOLAND QUARRY; 1987-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Mountain Stone Inc → NOLAND QUARRY; 2021-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Raul  Vasquez → Blue Mountain Stone Inc; 2021-05-25 to current/open; source msha-controller-operator-history