# Relationship history for MSHA mine 4503016

Current hierarchy: **Poe Don M → Poe Asphalt Paving Inc → Portable Pug Plant**

- 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:** Poe Don M → Portable Pug Plant; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Poe Asphalt Paving Inc → Portable Pug Plant; 1984-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Poe Don M → Poe Asphalt Paving Inc; 1984-06-01 to current/open; source msha-controller-operator-history