# Relationship history for MSHA mine 3304358

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

- 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

- **controller_controls_mine:** Colas S A → Evans Gravel Inc; 1979-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barrett Paving Materials Inc → Evans Gravel Inc; 1995-08-01 to 2003-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Barrett Paving Materials Inc; 1995-08-01 to 2003-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Evans Gravel Inc → Evans Gravel Inc; 2003-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug  Evans → Evans Gravel Inc; 2003-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug  Evans → Evans Gravel Inc; 2003-03-17 to current/open; source msha-controller-operator-history