# Relationship history for MSHA mine 3304586

Current hierarchy: **Doug  Evans → Evans Gravel Inc. → Evans Gravel**

- 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:** Doug  Evans → Evans Gravel; 2003-03-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Evans Gravel Inc. → Evans Gravel; 2007-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Evans → Evans Gravel Inc.; 2007-04-06 to current/open; source msha-controller-operator-history