# Relationship history for MSHA mine 4300266

Current hierarchy: **Hills Jeffrey R → Hills Commercial Properties → Lucky Strike**

- 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

- **operator_operates_mine:** Town Of Dorset → Lucky Strike; 1950-01-01 to 1986-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Dorset-Vt → Lucky Strike; 1950-01-01 to 1986-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Dorset-Vt → Town Of Dorset; 1950-01-01 to 1986-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Hills Commercial Properties → Lucky Strike; 1986-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hills Jeffrey R → Lucky Strike; 1986-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hills Jeffrey R → Hills Commercial Properties; 1986-02-20 to current/open; source msha-controller-operator-history