# Relationship history for MSHA mine 4503357

Current hierarchy: **Goodfellow Brothers LLC → Morrill Asphalt Paving Company Inc → PORTABLE CRUSHER #1**

- 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:** Goodfellow Brothers LLC → PORTABLE CRUSHER #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Morrill Asphalt Paving Company Inc → PORTABLE CRUSHER #1; 1997-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodfellow Brothers LLC → Morrill Asphalt Paving Company Inc; 1997-02-01 to current/open; source msha-controller-operator-history