# Relationship history for MSHA mine 1519827

Current hierarchy: **Thorberg Collectorate Inc → 101 Coal Inc. → Putney Darby Mine #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:** Tim B  Lusby → Putney Darby Mine #1; 2017-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JRL Coal Inc → Putney Darby Mine #1; 2018-02-28 to 2025-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Tim B  Lusby → JRL Coal Inc; 2018-02-28 to 2025-06-24; source msha-controller-operator-history
- **controller_controls_mine:** George  Hillyer → Putney Darby Mine #1; 2025-04-30 to 2025-07-29; source msha-controller-operator-history
- **operator_operates_mine:** 101 Coal Inc. → Putney Darby Mine #1; 2025-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Hillyer → 101 Coal Inc.; 2025-06-25 to 2025-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Thorberg Collectorate Inc → Putney Darby Mine #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