# Relationship history for MSHA mine 3609918

Current hierarchy: **Doug P  Pascoe → Pascoe Flagstone → Pascoe Portable**

- 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:** Pascoe Flagstone → Pascoe Portable; 2011-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doug P  Pascoe → Pascoe Portable; 2011-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doug P  Pascoe → Pascoe Flagstone; 2011-04-13 to current/open; source msha-controller-operator-history