# Relationship history for MSHA mine 4606002

Current hierarchy: **Fitzgibbon Daniel → Hawthorne Industries Inc → Golden Ridge No 5**

- 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

- **operator_operates_mine:** Dartmoor Coal Company → Golden Ridge No 5; 1979-05-01 to 1980-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Lambert Joe L → Golden Ridge No 5; 1979-05-01 to 1980-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Lambert Joe L → Dartmoor Coal Company; 1979-05-01 to 1980-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Hawthorne Industries Inc → Golden Ridge No 5; 1980-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fitzgibbon Daniel → Golden Ridge No 5; 1980-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fitzgibbon Daniel → Hawthorne Industries Inc; 1980-10-16 to current/open; source msha-controller-operator-history