# Relationship history for MSHA mine 1519939

Current hierarchy: **Thorberg Collectorate Inc → 101 Coal Inc. → Coalgood Darby 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Tim B  Lusby → Coalgood Darby 1; 2017-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JRL Coal → Coalgood Darby 1; 2023-01-30 to 2025-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Tim B  Lusby → JRL Coal; 2023-01-30 to 2025-04-29; source msha-controller-operator-history
- **operator_operates_mine:** 101 Coal Inc. → Coalgood Darby 1; 2025-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George  Hillyer → Coalgood Darby 1; 2025-04-30 to 2025-07-29; source msha-controller-operator-history
- **controller_controls_operator:** George  Hillyer → 101 Coal Inc.; 2025-04-30 to 2025-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Thorberg Collectorate Inc → Coalgood Darby 1; 2025-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thorberg Collectorate Inc → 101 Coal Inc.; 2025-07-30 to current/open; source msha-controller-operator-history