# Relationship history for MSHA mine 2002537

Current hierarchy: **Peake Fred → National Asphalt Paving Inc → Almont Gravel Co Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** National Asphalt Paving Inc → Almont Gravel Co Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peake Fred → Almont Gravel Co Pit; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peake Fred → National Asphalt Paving Inc; 1980-04-01 to current/open; source msha-controller-operator-history