# Relationship history for MSHA mine 1800779

Current hierarchy: **John P  Boyle → Everson Resources Inc → C Mine Strip**

- 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:** Everson Resources Inc → C Mine Strip; 2008-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John P  Boyle → C Mine Strip; 2008-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John P  Boyle → Everson Resources Inc; 2008-04-22 to current/open; source msha-controller-operator-history