# Relationship history for MSHA mine 0302092

Current hierarchy: **Bob James Fecho → dixie crystal company → twin creek crystal 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Bob James Fecho → twin creek crystal mine; 2014-07-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** dixie crystal company → twin creek crystal mine; 2024-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob James Fecho → dixie crystal company; 2024-04-17 to current/open; source msha-controller-operator-history