# Relationship history for MSHA mine 0301660

Current hierarchy: **Neal  Smith → C & N Quartz Mine → GOOD VIBES**

- 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:** Newton Crystals → GOOD VIBES; 1989-07-01 to 1992-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Robert N Gardner → GOOD VIBES; 1989-07-01 to 1992-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Robert N Gardner → Newton Crystals; 1989-07-01 to 1992-11-11; source msha-controller-operator-history
- **operator_operates_mine:** C & N Quartz Mine → GOOD VIBES; 1992-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Neal  Smith → GOOD VIBES; 1992-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neal  Smith → C & N Quartz Mine; 1992-11-12 to current/open; source msha-controller-operator-history