# Relationship history for MSHA mine 0301978

Current hierarchy: **Stuart  Schmitt → Clear Creek Crystal Mine → DeLinde Wavellite Mine**

- 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:** Clear Creek Crystal Mine → DeLinde Wavellite Mine; 2008-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stuart  Schmitt → DeLinde Wavellite Mine; 2008-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stuart  Schmitt → Clear Creek Crystal Mine; 2008-10-20 to current/open; source msha-controller-operator-history